One of the readers suggested the following tool for recovering corrupted excel files.
It feels like a handy tool to help in case of excel file corruptions. Also it covers a wide variety of files like *.xls, *,xlt, *.xlsx, xlsm, *.xltm, *.xltx, *.xlam.
I haven't had a chance yet to use it 'cos i dont have a corrupted excel file for the time being (but yes of course have gone through its features :)
Wish I could have had it few months back :).
For more details about the recovery tool click here
Not feeling patient.... K download it directly
Hope this Helps :)