Here's the list of the computer components:

Case: ThermalTake Armor VA8000BWS Full Tower
Power Supply: Cooler Master Real Power 650W
Processor: Core 2 Duo E8400 (3.0GHz) Retail
Motherboard: ASUS P5E
Memory: 2x1GB Corsair XMS2-8500 (TWIN2X2048-8500C5)
Hard Drive: Seagate Barracuda 7200.10 750GB SATA
Video Card: GeForce 8800 GTX 768MB
Sound Card: Creative Labs Sound Blaster X-Fi XtremeGamer
Speakers: Logitech THX Z-5300e 5.1 Speakers
DVD-/+RW: Samsung SH-S203B 20X SATA
Mouse: Logitech MX Revolution Laser Cordless Mouse
Keyboard: Logitech G15 Gaming Keyboard
Operating System: Windows Vista Home Premium

I tried resetting the memory, moved it from one channel to the other and back. At one point, I got a long beep, and 2 short ones which "the Google" tells me is a video error. I reset that and it went back to 1 long (20+ seconds in length) beep which repeated until I got sick of hearing it.

Any ideas? And/or is there something else I should try?