Analyst upgrades: SONS, KNXA, CP, AMAT and PWAV

MOST NOTEWORTHY: Sonus Networks, Kenexa, Canadian Pacific, Applied Materials and Powerwave Tech were today's noteworthy upgrades:

Merriman upgraded Sonus Networks (NASDAQ: SONS) to Neutral from Sell following its win at BT Group (NYSE: BT) for its ASX platform, which the firm believes endorses the company's technology.
Cantor upgraded Kenexa (NASDAQ: KNXA) to Buy from Hold. The firm finds the stock being 40%+ off due to the 3Q weak earnings report as quite an overreaction and believes there is more than enough upside to advise buying shares. Management announced a 2M share buyback program.
Shares of Canadian Pacific (NYSE: CP) was upgraded to Sector Outperformer from Sector Performer at CIBC, as they believe the strong Canadian Dollar and the delay in STB approval of the DM&E acquisition is priced into shares.
Applied Materials (NASDAQ: AMAT) was upgraded to Outperform from Neutral at JP Morgan and to Buy from Hold at Citigroup; Citigroup expects capex revisions to start to reverse in mid-08 and views solar as a free option.
Piper Jaffray raised its rating on Powerwave Technologies (NASDAQ: PWAV) to Outperform from Market Perform on valuation and seasonally strong Q4 capex trends.

OTHER UPGRADES:

eBay (NASDAQ: EBAY) was upgraded to Outperform from Market Perform at Piper Jaffray.
Morgan Joseph upgraded Perini (NYSE: PCR) to Buy from Hold and Shuffle Master (SHFL) to Hold from Sell.
Goldman upgraded China Petroleum & Chemical Corp (NYSE: SNP) to Buy from Neutral.

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