OK, you should be able to recover at least some of it. Try running this on it:
http://www.piriform.com/recuva
It's the best free file recovery program I know of. The major downside is that it doesn't recover text files.
There are some that are much better, but you'll need to pay for them, such as this:
http://www.reneelab.com/product-win-Renee-Undeleter.html
There are probably even better ones, you may want to check out a local computer store, too.
http://www.piriform.com/recuva
It's the best free file recovery program I know of. The major downside is that it doesn't recover text files.
There are some that are much better, but you'll need to pay for them, such as this:
http://www.reneelab.com/product-win-Renee-Undeleter.html
There are probably even better ones, you may want to check out a local computer store, too.