I know old thread but don't see a reason to start a new one.
Would this work for wifi on the xbox 360 ?
http://www.ebay.com/itm/New-Mini-USB-Wifi-Router-AP-Wireless-N-repeater-Adapter-WLAN-Range-Extender-128-/221137586986?pt=US_USB_Wi_Fi_Adapters_Dongles&hash=item337cd3cb2a