There are plenty of posts claiming that you cannot recover files from corrupted ext3. I have, but it was not easy, not recent, and I do not remember which tools I used. I think I used some forensic "file carving" utilities. I learned a lot from that experience (then forgot all of it).
It is not impossible, but it is not easy.
At this time, this looks like a promising approach for ext3 recovery:
https://files.sans.org/summit/forens...leRecovery.pdf
And this:
http://www.giis.co.in/
And check out the file carving links here:
http://www.forensicswiki.org/wiki/Toolsata_Recovery