Sooner or later you have to ask yourself how badly you want to play Live.
Don't want wires dragging you down when fragging your best friend in Halo? Then this wireless XBox controller is for you. Developed by Mad Catz, the Lynx wireless controller features 900MHz communication with 12 sub-channels, dual rumble pack, and 50-foot communication range and runs on 3-AA batteries.
The downside to the product is that the memory ports are located at the base station, and not at the controller. This makes the Communicator package for XBox Live! difficult to use. But don't take my word for it, see for yourself.
Source: IGN Lynx Review