Wired costs less, and it does the same job. Also, if you ever get a 360 and don't want to spend tons of cash on batteries, get the wired one. ;)
Extra controllers FTW!
Random game thought :
Why is Bionic Commando Rearmed 2 getting so much hate? We finally get a real game and they're not even satisfied... I'm starting to hate the gaming community so f****** much...