Analyst upgrades 7/28/2010...TomoTherapy (NASDAQ:TOMO) upgraded to Outperform from Neutral at RW Baird... BE Aerospace (NASDAQ:BEAV) upgraded two notches to Hold from Sell at Societe Generale... BP (NYSE:BP) upgraded to Outperform from Neutral at Macquarie... Brigham Exploration (NASDAQ:BEXP) initiated at Buy at Global Hunter... CH Robinson Worldwide (NASDAQ:CHRW) upgraded to Outperform from Market Perform at BMO Capital... Continental Resources (NYSE:CLR) initiated at Buy at Global Hunter... eHealth (NASDAQ:EHTH) upgraded to Buy from Neutral at BofA/Merrill... Entegris (NASDAQ:ENTG) upgraded two notches to Hold from Sell at Citigroup... Global Payments (NYSE:GPN) upgraded to Overweight from Equal Weight at Stephens... Lihir Gold (NASDAQ:LIHR) upgraded to Outperform from Sector Performer at RBC Capital... Rowan (NYSE:RDC) upgraded to Overweight from Equal Weight at Morgan Stanley... Whiting Petroleum (NYSE:WLL) initiated at Buy at Global Hunter...