This deal has ended.
Buy.com has the D-Link AirPlus Xtreme G Wireless USB Adapter for $25.99. A $15 mail-in rebate, valid through 2/28, cuts the price to $10.99. Plus, shipping is free and there is no sales tax (except CA, MA, MD, TN). This connects anything from a desktop, laptop or TiVo to the internet at speeds up to 108MBps.