Global smart phone sales are forecast to hit 252 million this year, according to research firm Gartner. That would be up a blistering 49% from 2009 and well beyond the 19% growth expected in general cell phone sales. Waterloo, Ontario-based Research In Motion (RIMM), with its BlackBerry line of smart phones, is the No. 2 seed in that market. BlackBerrys got their start back in the days of personal digital assistants, or PDAs. At the turn of the