Dang it, I was in Costco last night, didn't even look at the games. The store was closing for the night, and they had already closed the refrigerator room, so I'll have to go back in the next few days. I'll try to remember to check this out.
P.S. They had plenty of the good Xbox 360 bundles up front by the registers. Not really news at this point, I suppose, but for anyone still looking. This was the Cool Springs (TN) Costco.