TRENDnet 108Mbps 802.11g MIMO Wireless PC Card – TEW-601PC $19.99

Designed to give you wider coverage, the MIMO 802.11g Wireless PC Card seamlessly connects to your wireless network without performance degradation. It also supports universal wireless connectivity with 802.11b or 802.11g networks, reaches speeds of up to 108Mbps, and secures wireless transmissions with either WPA or WEP encryption.

Buy.com is carrying this Wireless PC Card for $19.99