A little more than ten years since the first BlackBerry hit the market, RIM is celebrating a major milestone: 50 million units sold, with 21 million subscribers (suggesting subscribers have averaged over two BlackBerry purchases) transferring some three petabytes a month. That 50 million figure sounds epic -- and indeed, it is -- but let's take a moment to put it in perspective, shall we? Symbian found its way onto nearly 80 million handsets in 2007 alone, and the operating system (in its various forms, but mainly S60) is found on a
