It is interesting to watch some of the team strategies on this type of stage.
A couple of teams have sent riders across to the breakaway group with the purpose of joining them but not helping the, - sort of a slow them down and sabotage their gap.
Meanwhile wthe peleton has slowed perceptably allowing Cancellara and other s to catch back up.
Astana and Radio Shack move to the front of the peleton - probably a move to keep Contador and Armstrong safe during the descent.
Interesting, I had no idea.