Smeags on 22 November 2009
Yeah, we've had to replace my brother's 360 twice now. One was repaired for the 3 year warranty, but the second problem was with the HDD. It's not all bad though, it gave us an excuse to replay all of our games when we got a new Hard Drive. 
Sorry to hear about your 360 though, that's rough. Especially when a game such as L4D2 comes out (can't wait to play that game. I tried to convince my brother to get it instead of MW2 haha).
