Exhibit 99.2
Footnote Disclosure

(1) Represents securities held directly by St. Paul Venture
Capital V, LLC, which is jointly managed by Split Rock Partners,
LLC and Vesbridge Partners, LLC.  Voting and investment power
over the shares, however, has been delegated solely to Split
Rock Partners, LLC.  Split Rock Partners, LLC has delegated
voting and investment decisions with respect to the shares to
four individuals who require a two-thirds vote to act.  St.
Paul Fire and Marine Insurance Company, a wholly owned subsidiary
of The St. Paul Travelers Companies, Inc., has the right to
appoint a majority of the members of the board of directors of
St. Paul Venture Capital V, LLC, and owns a controlling interest
of St. Paul Venture Capital V, LLC. Each of Split Rock Partners,
LLC, St. Paul Fire and Marine Insurance Company and The St. Paul
Travelers Companies, Inc. may be deemed to be an indirect
beneficial owner of the reported securities.  Each of Split Rock
Partners, LLC, St. Paul Fire and Marine Insurance Company and
The St. Paul Travelers Companies, Inc. disclaims any beneficial
ownership of the reported securities, except to the extent of
any pecuniary interest therein.  This report shall not be deemed
an admission that any of the reporting persons is the beneficial
owner of such securities for purposes of Section 16 or for any
other purpose.

(2) Represents securities held directly by St. Paul Venture
Capital Affiliates Fund I, LLC, which is jointly managed by
Split Rock Partners, LLC and Vesbridge Partners, LLC. Voting
and investment power over the shares, however, has been delegated
solely to Split Rock Partners, LLC.  Split Rock Partners, LLC has
delegated voting and investment decisions with respect to the
shares to four individuals who require a two-thirds vote to act.
Split Rock Partners, LLC may be deemed to be an indirect beneficial
owner of the reported securities.  Split Rock Partners, LLC
disclaims any beneficial ownership of the reported securities,
except to the extent of any pecuniary interest therein.  This
report shall not be deemed an admission that any of the reporting
persons is the beneficial owner of such securities for purposes
of Section 16 or for any other purpose.

(3) In prior reports, 375,000 shares were reported as being held
indirectly through Windamere, LLC.  On October 11, 2005 and October
25, 2005, Windamere, LLC liquidated 49,121 shares to its members.
As part of this distribution, St. Paul Fire and Marine Insurance
Company received directly 48,630 shares and SPVC Partners I, LLC
received directly 388 shares.  As a result of the distribution,
Windamere, LLC holdings decreased from 375,000 to 325,879.

(4) Represents securities held directly by SPVC Partners I, LLC,
which is jointly managed by Split Rock Partners, LLC and Vesbridge
Partners, LLC. Voting and investment power over the shares,
however, has been delegated solely to Split Rock Partners, LLC.
Split Rock Partners, LLC has delegated voting and investment
decisions with respect to the shares to four individuals who
require a two-thirds vote to act. Split Rock Partners, LLC may
be deemed to be an indirect beneficial owner of the reported
securities.  Split Rock Partners, LLC disclaims any beneficial
ownership of the reported securities, except to the extent of
any pecuniary interest therein.  This report shall not be deemed
an admission that any of the reporting persons is the beneficial
owner of such securities for purposes of Section 16 or for any
other purpose.

(5) Represents securities held directly by Windamere, LLC.
Voting and investment power over the shares are generally held
by the managing member of Windamere, LLC; however, investments
or dispositions in excess of certain amounts must be approved
by the board of directors of Windamere, LLC.  Split Rock Partners,
LLC has the right to appoint a majority of the members of the
board of directors of Windamere, LLC.  St. Paul Fire and Marine
Insurance Company, a wholly owned subsidiary of The St. Paul
Travelers Companies, Inc., owns a controlling interest of Windamere,
LLC.  Each of Split Rock Partners, LLC, St. Paul Fire and Marine
Insurance Company and The St. Paul Travelers Companies, Inc. may
be deemed to be an indirect beneficial owner of the reported
securities.  Each of Split Rock Partners, LLC, St. Paul Fire and
Marine Insurance Company and The St. Paul Travelers Companies, Inc.
disclaims any beneficial ownership of the reported securities,
except to the extent of any pecuniary interest therein.  This
report shall not be deemed an admission that any of the reporting
persons is the beneficial owner of such securities for purposes
of Section 16 or for any other purpose.

(6) In prior reports, 1,140,201 shares were reported as being
held indirectly through Fog City Fund, LLC.  On October 11, 2005
and October 25, 2005, Fog City Fund, LLC liquidated 149,324 shares
to its members.  As part of this distribution, St. Paul Fire and
Marine Insurance Company received directly 147,831 shares, and
SPVC Management VI, LLC received directly 260 shares.  As a result
of the distribution, Fog City Fund, LLC holdings decreased from
1,140,201 to 990,877.

(7) Represents securities held directly by SPVC Management VI,
LLC, which is jointly managed by Split Rock Partners, LLC and
Vesbridge Partners, LLC. Voting and investment power over the
shares, however, has been delegated solely to Split Rock Partners,
LLC.  Split Rock Partners, LLC has delegated voting and investment
decisions with respect to the shares to four individuals who
require a two-thirds vote to act. Split Rock Partners, LLC may
be deemed to be an indirect beneficial owner of the reported
securities.  Split Rock Partners, LLC disclaims any beneficial
ownership of the reported securities, except to the extent of
any pecuniary interest therein.  This report shall not be deemed
an admission that any of the reporting persons is the beneficial
owner of such securities for purposes of Section 16 or for any
other purpose.

(8) Represents securities held directly by Fog City Fund, LLC.
Voting and investment power over the shares are generally held
by the managing member of Fog City Fund, LLC; however, investments
or dispositions in excess of certain amounts must be approved
by the board of directors of Fog City Fund, LLC.  Split Rock
Partners, LLC has the right to appoint a majority of the members
of the board of directors of Fog City Fund, LLC.  St. Paul Fire
and Marine Insurance Company, a wholly owned subsidiary of The
St. Paul Travelers Companies, Inc., owns a controlling interest
of Fog City Fund, LLC.  Each of Split Rock Partners, LLC, St.
Paul Fire and Marine Insurance Company and The St. Paul Travelers
Companies, Inc. may be deemed to be an indirect beneficial owner
of the reported securities.  Each of Split Rock Partners, LLC,
St. Paul Fire and Marine Insurance Company and The St. Paul
Travelers Companies, Inc. disclaims any beneficial ownership
of the reported securities, except to the extent of any pecuniary
interest therein.  This report shall not be deemed an admission
that any of the reporting persons is the beneficial owner of
such securities for purposes of Section 16 or for any other
purpose.

(9) In prior reports, 469,003 shares were reported as being held
indirectly through Windamere II, LLC.  On October 11, 2005 and
October 25, 2005, Windamere II, LLC liquidated 61,422 shares to
its members.  As part of this distribution, St. Paul Fire and
Marine Insurance Company received directly 60,808 shares, and
SPVC Partners I, LLC received directly 129 shares.  As a result
of the distribution, Windamere II, LLC holdings decreased from
469,003 to 407,581.

(10) Represents securities held directly by Windamere II, LLC.
Voting and investment power over the shares are generally held
by the managing member of Windamere II, LLC; however, investments
or dispositions in excess of certain amounts must be approved by
the board of directors of Windamere II, LLC.  Split Rock Partners,
LLC has the right to appoint a majority of the members of the board
of directors of Windamere II, LLC.  St. Paul Fire and Marine
Insurance Company, a wholly owned subsidiary of The St. Paul
Travelers Companies, Inc., owns a controlling interest of Windamere
II, LLC.  Each of Split Rock Partners, LLC, St. Paul Fire and Marine
Insurance Company and The St. Paul Travelers Companies, Inc. may be
deemed to be an indirect beneficial owner of the reported securities.
Each of Split Rock Partners, LLC, St. Paul Fire and Marine Insurance
Company and The St. Paul Travelers Companies, Inc. disclaims any
beneficial ownership of the reported securities, except to the extent
of any pecuniary interest therein.  This report shall not be deemed
an admission that any of the reporting persons is the beneficial
owner of such securities for purposes of Section 16 or for any other
purpose.

(11) Represents securities held directly by St. Paul Venture Capital
VI, LLC, which is jointly managed by Split Rock Partners, LLC and
Vesbridge Partners, LLC.  Voting and investment power over the shares,
however, has been delegated solely to Split Rock Partners, LLC.  Split
Rock Partners, LLC has delegated voting and investment decisions with
respect to the shares to four individuals who require a two-thirds vote
to act.  St. Paul Fire and Marine Insurance Company, a wholly owned
subsidiary of The St. Paul Travelers Companies, Inc., has the right
to appoint a majority of the members of the board of directors of St.
Paul Venture Capital VI, LLC, and owns a controlling interest of St.
Paul Venture Capital VI, LLC. Each of Split Rock Partners, LLC, St.
Paul Fire and Marine Insurance Company and The St. Paul Travelers
Companies, Inc. may be deemed to be an indirect beneficial owner of
the reported securities.  Each of Split Rock Partners, LLC, St. Paul
Fire and Marine Insurance Company and The St. Paul Travelers Companies,
Inc. disclaims any beneficial ownership of the reported securities,
except to the extent of any pecuniary interest therein.  This report
shall not be deemed an admission that any of the reporting persons
is the beneficial owner of such securities for purposes of Section
16 or for any other purpose.

(12) In prior reports, 217,391 shares were reported as being held
indirectly through Windamere III, LLC.  On October 11, 2005 and October
25, 2005, Windamere III, LLC liquidated 28,470 shares to its members.
 As part of this distribution, St. Paul Fire and Marine Insurance Company
received directly 28,186 shares, and SPVC Management VI, LLC received
directly 50 shares.  As a result of the distribution, Windamere III,
LLC holdings decreased from 217,391 to 188,921.

(13) Represents securities held directly by Windamere III, LLC.  Voting
and investment power over the shares are generally held by the managing
member of Windamere III, LLC; however, investments or dispositions in
excess of certain amounts must be approved by the board of directors
of Windamere III, LLC.  Split Rock Partners, LLC has the right to appoint
a majority of the members of the board of directors of Windamere III, LLC.
 St. Paul Fire and Marine Insurance Company, a wholly owned subsidiary
of The St. Paul Travelers Companies, Inc., owns a controlling interest
of Windamere III, LLC.  Each of Split Rock Partners, LLC, St. Paul Fire
and Marine Insurance Company and The St. Paul Travelers Companies, Inc.
may be deemed to be an indirect beneficial owner of the reported
securities.  Each of Split Rock Partners, LLC, St. Paul Fire and Marine
Insurance Company and The St. Paul Travelers Companies, Inc. disclaims
any beneficial ownership of the reported securities, except to the extent
of any pecuniary interest therein.  This report shall not be deemed an
admission that any of the reporting persons is the beneficial owner of
such securities for purposes of Section 16 or for any other purpose.