This is a nice little mod, unfortunately it is for the original Xbox. Let's just hope BrutalByte over at iHacked finds a way to do it for the 360. He installed a Netgear Wi-Fi adapter internally in the Xbox to allow a for a wireless connection without having messy adapters adding to the tangle mess already behind your entertainment center. Nice work, but forewarning, this may void your Xbox warranty and this mod does take a little bit of electronics know-how.
Install A Wireless Card Into Your Xbox [iHacked]