While most Xbox 360 games make using a control pad enjoyable, there are still a lot of people who prefer using a mouse and keyboard, especially on shooters. This peripheral lets you combine the best of both worlds.
The XIM series of controller adapters for the Xbox 360 have been around for a while now, but they've been tricky to use and expensive. The new XIM3, however, seems to have a fix for both those problems.
For one, while previous models were a little...ghetto, the XIM3 is housed in a classy LCD box with touch-screen display, which hopefully makes connection and configuration a cinch.
It'll also be cheaper than the last version, which came in at USD$200, because it no longer needs to use specific forms of wired controller to connect to the Xbox 360.