This deal has ended.
HP.com has a new $200 off $699 coupon valid on desktops (use code DT6218). Their tiny HP Slimline s3500z Desktop starts at only $449 (without instant discount), so load it up with $250 in upgrades, enter the coupon code and you'll pay just $499.99. On top of the 2.3GHz AMD dual-core processor, 250GB hard drive, DVD / CD burner, 15-in-1 memory card reader and Windows Vista Home Premium, I'd add the 3GB memory ($100) and a 17" HP w1707 widescreen flat panel monitor ($150 after rebate). This gets you to $699, so you'll pay just $499 after the coupon. Shipping is free.