| UPGRADES & DOWNGRADES HISTORY |
| Date | Research Firm | Action | From | To | | 25-Apr-07 | Needham & Co | Downgrade | Buy | Hold | | 3-Apr-07 | Merriman Curhan Ford | Initiated | | Neutral | | 26-Apr-06 | Needham & Co | Upgrade | Hold | Buy | | 21-Oct-05 | Needham & Co | Downgrade | Buy | Hold | | 13-Jun-05 | Needham & Co | Upgrade | Hold | Buy | | 11-Jan-05 | Needham & Co | Downgrade | Strong Buy | Hold | | 1-Nov-04 | Needham & Co | Upgrade | Buy | Strong Buy | | 2-Aug-04 | Thomas Weisel | Initiated | | Peer Perform |
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| Current Month | Last Month | Two Months Ago | Three Months Ago | | Strong Buy | | | | | | Buy | | | | | | Hold | | | | | | Underperform | | | | | | Sell | | | | |
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