I did take a look, but it's a theory I've heard presented before, and I've never seen much evidence to back it up. You won't either, because Bin Laden is by now so irrelevant to the global al Qaeda movement that nobody really cares whether he's alive or not.

I hope he is alive, because at this point the only possible harm he could do is if he were dead, but who knows? Whatever it is, he isn't doing much.