This years after christmas sales are pretty damn weak. Unless Gamestop has a buy 2 get 1free this weekend it'll be the first time in years that they didn't have on the day after. I've yet to see any deals too good to pass up, even on Steam.
The best sales seem to be on Live and PSN. --- I will not be pushed, filed, stamped, indexed, briefed, debriefed, or numbered! My life is my own.