Here, we combine several rebates. You should use the BrandsForLess link below and click their link to Computers4Sure. The 3dfx rebate is good till September. You'll need Adobe Acrobat to view the 3dfx rebate. Credit goes to Trifecta at AnandTech.
National holidays are worse than Sundays for deals.
The rebate applies only for owners of previous versions of Norton AntiVirus. They let you send in the old CD or whatever. Shipping is free, and no tax on top of that.