Xbox Joybox ConverterCheck this thing out, it let's you hook up a PS2 controller to an Xbox! Just in case you have someone that is using the exscuse that he's only good with his PS2 controller. It's about $15.
Use your PS or PS2 controller on the Xbox Supports vibration function With memory card slot for save game data
With the Joybox Converter you can connect any PlayStation or even PlayStation2 joypad to your Xbox console. It supports vibration function plus features a memory card slot for saving game data.