dieselfuel, that article I referred to earlier discussed the military's criteria for considering a drive wiped. It said that for NON-classified info, a drive has to be reformatted at least seven times before it can be considered wiped and, apparently, some info can still be recovered even after seven wipes. (For classified info, they basically incinerate the drive.)
Therefore, I'm thinking that despite your multiple reformatting attempts, at least some of your data is still there. So I second Bruce's suggestion that you at least ask the pros how much they think they can recover before giving up on it.
(:
augie