As a Bears fan, and currently a happy one at that [cough]Cutler[/cough], I hope he does play for the Vikings.
It'll give our *hopefully* resurgent defense 2 more chances to break his old bones like kindling.
Seriously, as bad as he looked most of last year, how does he expect to get revenge on anybody?
I agree. He doesn't have a whole lot left in the tank and he's always relied on being able to make throws that nobody else can instead of being technically sound. A diminished Favre can has a lot of potential for INTs.