Gartenberg Discusses Outlook for BlackBerry Tablet

July 30 (Bloomberg) -- Michael Gartenberg, partner at research firm Altimeter Group LLC, talks about the possibility of a tablet computer by Research In Motion Ltd., the makers of the BlackBerry handheld device, and the outlook for a Facebook Inc. initial public offering. Gartenberg speaks with Pimm Fox on Bloomberg Television's "Taking Stock". (Source: Bloomberg)