I've had luck with a piece of Software called PhotoRescue - My friend (really - not me, I swear - actually my father-in-law) had formatted a CF card thinking that "format" meant 4x6, 5x7, 8x10, etc.. The program found tons of files on the card including one's that were from old shoots. Anyway - they're are a bunch of pieces of software out now that will do the same thing. Most of them offer a demo and will show you what they can recover before you have to pay the license fee to actually get the files. Do a Google search to see what you come up with.