| UPGRADES & DOWNGRADES HISTORY |
| Date | Research Firm | Action | From | To | | 20-Nov-07 | Roth Capital | Upgrade | Hold | Buy | | 25-Oct-07 | Brean Murray | Initiated | | Buy | | 21-May-07 | Jefferies & Co | Initiated | | Buy | | 16-Apr-07 | Goldman Sachs | Upgrade | Sell | Neutral | | 4-Apr-07 | Merriman Curhan Ford | Initiated | | Buy | | 6-Mar-07 | Goldman Sachs | Downgrade | Neutral | Sell | | 21-Jun-06 | Roth Capital | Downgrade | Buy | Hold | | 29-Nov-05 | CIBC Wrld Mkts | Initiated | | Sector Outperform | | 15-Jun-05 | Jefferies & Co | Upgrade | Hold | Buy | | 6-May-05 | Jefferies & Co | Downgrade | Buy | Hold |
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| Current Month | Last Month | Two Months Ago | Three Months Ago | | Strong Buy | | | | | | Buy | | | | | | Hold | | | | | | Underperform | | | | | | Sell | | | | |
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