Filed under: Cellphones, HandheldsStock downgrades are nothing new for the boys and girls at Palm, but analyst Tavis McCourt of Morgan Keegan (which certainly sounds like an important and all-knowing firm) has painted a particularly bleak picture of the company's books today -- so grim, in fact, that it set off a 20 percent drop in the company's market cap. Apparently the big concern is Palm's cash burn rate, which has dwindled to just under a quarter billion dollars through a se
