Alonso to Renault after some negotiating between Dennis and Briatore. Fisi to Toyota as you've stated already, and the Renault test driver to McLaren. I've forgotten his name. Ferrari have both drivers under contract for next season and without some reliability issues would have won the constructors and drivers outright this year.
Piquet Jr?????? To McLaren?????? Not convinced. Perhaps a Kovalainen/Alonso swap is in order, then at Renault we could see Alonso with Piquet Jr. Fisichella's off, that's clear. Honestly, the Raikkonen/Massa combination at Ferrari is good. For the first time in an impressive number of years, we've seen Ferrari give both drivers a shot at the title. Best kept that way, and hiring Alonso would be a mistake - he'll stop at no underhand trick to break up an equal team, as we know from this year. But, as you say, both Ferrari drivers are under contract, so I'd be surprised if either leaves. Plus they have got on decently, despite both drivers being capable of winning. My bets are on Raikkonen or Massa claiming the title next season, providing there are no reliability mishaps like this year.