I just pulled the trigger on this too. I'd been shopping for parts for a new rig, and this looks like a great time to buy. I got:
(all retail)
* Gigabyte GA-P35 intel mobo
* intel C2D e6750 CPU
* 2 GB G-Skill DD2 800 ram (2x1gb)
* Western Digital 750MB AAKS Sata 3.0 drive
$480 up front, $430 after the $50 cash back. The WD HD benches at close to Raptor speed, and is $149 on sale now, normally $180'ish.
question: for those have taken advantage of this, did anyone ever get any confirmation on the $50 back? The only thing I saw was one of the pages leading up to the final confirmation, mentioning the promo. I never saw anything that confirmed a cash back coming.