Sara - Not trying to freak you out further, but Mozy actually is notorious for not being able to restore people with their backed up data. You can google tons of blogs that discuss the failings of Mozy and Carbonite.
The good news is, I have heard of many success stories with recovering data from friend EHDs. I have been told that most of the time, the actual hard drive is fine....it is just the case or a wire that has blown, as was stated before. It may cost you some bucks to get the data restored, but it can be done. If you post over at DST, I know that people will probably respond with suggestions for data recovery companies. Not sure if Geek Squad could handle it.....I think they can.....I think they outsource it to another company. It takes several weeks and serious bucks....but you get your data back.
Good luck!
Susan