If you go to your local gaming store they might/should/hopefully know a way to salvage your data and transfer it to a new console. It won't be cheap but it's better than nothing.

Actually if you have the detachable harddrive there is a little transfer cable you can pick up for probably about ten quid where you can steal all your save games and trout. YOU SHOULD BE SAVED THEN. I dunno it's been a while since I replaced mine but that cable just attaches to your hd and then to a usb and voila magic