It was great fun watching him implode with the J-E-T-S last year; it'll be great fun watching him do the same in purple this fall.  Can't wait until the first (and second, and third) game that the Vikes lose because of a boneheaded Favre pickoff when they should have been feeding Peterson the ball.  
I mean, Tavaris Jackson and Sage Rosenfels (sp?) are horrible, but what Minny needs is a classic, no-mistakes, ball-control QB; someone to keep the chains moving and to not do anything dumb.  They've got the running game, they've got the potentially-dominant defense; Favre is the exact wrong QB for this team.