VeloNews has written an excellent review of next years route.
It sounds like an absolute ripper. I'm really looking forward to Stage 19 (Gap - Col-d'Galiber, Grenoble, Alpe d-Huez) as it's where we did the bulk of our poking around in France earlier in the year.
Alpe d-Huez was the scene of the infamous 'hire bike wheel failure'. Unfinished business there, and I will be back in 2012 to make amends.
You can count on it.