Ridiculously cheap blu-rays like Iron Man and Transformers, free NBA '09 The Inside (netted me trophies and $32 BBV credit), and several other BF deals I can't even remember. Will definitely be anticipating for next year's massive sales.
Went with the constant Dell coupons. My friend picked up his 360 because of the $100 off savings and I partook in a few of the early instant cashback savings on games like GTA4. I saved a decent amount of money before it pricedrop'd and spent a good amount of time beating GTA4.