I'll probably regret saying this, but a singles bronze medal is not completely out of the question.
R1 - Mirnyi
R2 - Anderson
R3 - Davydenko/Gulbis
QF - Gonzalez/Ferrer
SF - Federer/Karlovic
Final - Nalbandian/Murray/Djokovic/Nadal
Reaching the 3rd round is the minimum of what I expect.
The doubles draw is pretty terrible, with Knowle/Melzer in R1 and the Bryans in R2. I don't think that they'll be able to reach the 2nd round.