Have you loaded anything else on the drive since the format?
If you have then most likely it is gone.
If you haven't there are several recovery software programs that may get some of it back. PC Inspector And Recovery Software
To be able to use PC INSPECTOR™ File Recovery 4.x you need a working WINDOWS™ System. Never install the current version on the drive from which you intend to recover data! The software must be installed and run on a second, independent drive.
After starting the program, you should first select the desired language. A menu will then appear in which you can select from three different reconstruction methods.
On the next page you can chose one of three reconstruction possibilities. The program includes an extensive html help.
Please note that PC INSPECTOR™ File Recovery 4.x cannot reconstruct files from data carriers that are mechanically or electronically damaged. You should only use data recovery software if you are very confident in the use of your PC.
If your hard disk or other data carrier has a mechanical or electronic defect or you do not feel confident in the use of data recovery software, we suggest that you contact a data recovery company such as "CONVAR - The Recovery Team".