http://www.dell.com/downloads/us/bsd/bsd_rebate_westerndigital_021029.pdf <-- is the link for the $100 OEM rebate. The retail version form is all over the Anandtech threads in case you need that one instead.

I got my OEM drive today! Now I wish I hadn't cancelled the retail one, perhaps I'd have two? Shouldn't be greedy I guess, a 120SE for $68 is pretty good for me!