http://microcenter.com/single_product_results.phtml?product_id=0255590 Sure it's only 2 GB but if you have another address you could send it to, then you'd get 4 for practically free (shipping) or definitely free with instore pickup.
Im pretty sure the rebate would be absolutely stupid and make you do a bunch of shit, Nvidia is notroious for this, and pretty much everything on NEWEGG.COM
Nah I received every single rebate I've ever turned in, and OCZ isn't an exception. They even have online tracking. Nvidia has nothing to do with this.