TRENDnet 108Mbps 802.11g Wireless USB 2.0 Adapter - TEW-444UB $30.99

TRENDnet's TEW-444UB 802.11g USB 2.0 Wireless adapter provides wireless connectivity with 802.11g, or 802.11b networks and an easy-to-install, backward compatible interface to bring the best wireless solution for desktop/mobile workstations. The TEW-444UB can reach blazing speeds of 108Mbps. It also dynamically encrypts wireless transmissions with WPA-TKIP or AES.

Buy.com is carrying this 802.11g Wireless USB 2.0 Adapter for $30.99