This deal has ended.
Buy.com has the Peerless SF640 Universal Flat Wall Mount for 23" - 46" LCDs and Plasma TVs at $34.99, the lowest available price. Plus, shipping is free with no sales tax (except CA, MA, MD, TN). Confirm that your TV is compatible with the "mount finder" tool on the manufacturer's homepage. These don't tilt or move, but are well-regarded and keep your flat-screen close (about 1") to the wall. It's also available in silver for the identical price. For larger TVs, the Peerless SF660 is $58.99 and the tilting Peerless ST650 is $68.32.