I haven't heard of other cases of projects becoming corrupted before . Have you invested a lot of time working on the project? I wondered if you would be able to import it into Photoshop CS5? You would need to upload it to the Creative Cloud website first and install a script to import it on the computer. The process is described here.
Do you have Photoshop CS5?
I have the same issue as this, and have posted in thread at http://forums.adobe.com/message/6126341 . I've seen some forums here where staff have offered to look at corrupt files for people to see if they can retrieve their work. Is this something you, as staff, are able to help with?