Amazon.com has Microsoft Wireless-G Xbox Adapter for $59.99
http://www.amazon.com/exec/obidos/t...53905-2391307?v=glance&s=electronics&n=493964
Adds an Xbox console to your high speed wireless network
Wirelessly play on the Xbox Live service with anyone anywhere
Internal and external antennae to maximize range and throughput
Intuitive Xbox Dashboard interface
Full compatibility with 802.11g and 802.11b Wi-Fi networks