Federer's quarter is a joke, interesting to see him handle the local boys in round two. Vik is the only one that can give him problems (he's not expected to win and on a blue moon can cause problems but not likely).
Davydenko Safin is the match that likely determines the Russian quarter. Don't think Misha and Igor wouldn't like a piece of the action either. Who knows how Hrbaty is feeling, but I believe he is banged up. If he's healthy he has the dubious distinction of a winning record against The Fed.
Agassi just removed all doubt about his quarter.
Henman is playing desperate tennis, Stepanek just came off his first win and Nadal is perfectly capable of challenging for the bottom quarter.