CheapyD from Cheap Ass Gamer has posted his best from the Sunday Ad deals. Some good stuff includes:

Call of Duty 4 - $38 at Best Buy and Target
Assassin’s Creed - $38 at Best Buy
Madden ‘08 - $38 at Best Buy and Target

There are a few more in his post and all the ads can be found in the forums. (Reg required to access the forums.)

Link: Best of the Sunday Ad Video Game Deals (12/23 - 12/29)