Webber will stay red bull for one more year, though there is no way he'd get the seat in 2013. However i see riccardo joining buemi next year at toro rosso, and i actually see buemi moving to partner Vetell in 2013. It doesnt seem like a swell idea, but i think in a great car he will be competitive.
Ferrari will not hire hamilton, Alonso and Hamilton dont get along, but Massa will probably leave in 2013 unless he ups his game a lot. Kobiashi has this seat neatly lined up if he continues his form into 2012 for a 2013 start.
Schumi will retire this year, Di Riesta wont be his replacement though. They may try a rookie....