before it's moved, there's some texts on the net, "Hard Drive Dispair Repair", stuff like putting it in a bag and into the freezer for a bit. Before you do things like replacing drive mechanisms in a "kinda clean" room, check data recovery services.
Boot off another drive and copy what you can over, use a utility that makes as perfect a backup as possible (no interpretation, just dumps the data). may i suggest a Seagate drive, about a year or two ago, the barracuda IV and V had the lowest number of failed drives of all manufacturors, and I've had no trouble.