This column brings you the most interesting and useful business and financial commentary on the world of technology every day. The Globe and Mail Link: RIM Shares Surge on Key Analyst's 'Buy' Rating Sharply Higher Target “Shares of Research In Motion Ltd. (NASDAQ:RIMM) are rising sharply again in premarket action this morning continuing a dramatic run as the launch of the BlackBerry 10 draws nearer and amid an upgrade from a key stock analyst.   “The stock is up by more than 6.5% so far before markets open.”   Reuters Link: Japan's Sharp Curbs iPad Screen Output as Apple ...