I believe, but I may be wrong, that right now only the MS USB device works with the USB port on the Xbox 360. However, of course, you can use any ethernet adapter in bridge mode attached to the ethernet port. The 360 will see a wired connection. There are adapters that can be powered off USB, if you don't want to use a wall wart. An ethernet adapter in bridge mode would need configuring on a PC initially to set it up for the local network.