It may not seem like all that, but the XIM3 Xbox 360 keyboard / mouse / etc. adapter seems to be giving some gamers a huge competitive edge on the Xbox 360. As the name states it is a device which acts as an adapter for your keyboard, mouse, and other devices. Although you may want this device for your own Xbox 360, it is unfortunate since almost immediately after it was released the XIM3 was sold out. You could always wait for the next wave to come out however it would not be surprising to see that there are people who are much better online now after they have purchased the XIM3. It does seem to be very unfortunate that it comes at the high price of $149, but for a hardcore gamer it is a small price to play for unlimited glory.

Sources: Engadget XIM3 (1) (2)