Get from Amazon.com : http://www.amazon.com/gp/product/B000220DG2?tag=hawaiianlegac-20
Blitzz BWU713 Wireless G USB Adapter (802.11b 11 Mbps)
USB allows you to switch from your desktop to your laptop with ease
Seamless roaming within the 80211 and 80211bg wireless LAN infrastructure
Greater flexibility to locate or move networked PCs
Supports Wired Equivalent Privacy
Provides user authentication to enforce tight security