'I am disappointed that Yahoo! has not moved towards accepting our offer,' wrote Microsoft CEO Steve Ballmer yesterday in what must be one of the great understatements of all time. 'But clearly a deal is not to be.' The words came in a letter sent to Yahoo!'s CEO and Chief Yahoo!, Jerry Yang. 'We continue to believe that our proposed acquisition made sense for Microsoft, Yahoo! and the market as a whole,' Ballmer noted, even as he announced that Microsoft has now officially withdrawn its proposal to acquire Yahoo! Inc. ...