Could you really tell if Obama switched blackberries midstream and started writing emails that weren't documented. we have this rule to preserve checks and balances and the freedom of information acts. if it's written, it must be recorded.
somehow you all miss the point, the president chooses advisors, those advisors come to him with information, he makes decisions based on that information. running the united states is a big task, last thing i want his our president wasting his time googling or making youtube videos. i can just see the presidential blog now...
there's plenty of other things obama needs to worry about than having a blackberry, for christ sake he's got a personal assistant that follows him around everywhere, that's his own real live flesh blackberry.