data recovery from unallocated harddisk partition
Solution 1:
Here is a link at lifehacker for top 5 data recovery tools
I just recently used testdisk for the first time (on ubuntu) and it worked well at finding info about my drive.
Solution 2:
So long as the deleted partition wasn't "extended FS" or whether that new one for Win 7 is, I have never found anything better than http://www.pcinspector.de/default.htm?language=1
And it's free