Mike, I had a hard disk die while I was at teh camp - I lost the thursday night data, and most of my data from November 2006 onwards :-(.
Turns out it was the external usb enclosure that's faulty, not the drive, but it's too late now to recover the data, it got thoroughly scrubbed while I was trying to recover it. I think the drive was writing empty sectors :-(
Anyway, I think the friday night data was better...