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Recovery of deleted files on ext3 is impossible. This is done to make sure that the filesystem can be recovered after a power loss/kernel freeze/similar problem. Andreas Dilger, an ext3 developper said this:
In order to ensure that ext3 can safely resume an unlink after a crash, it actually zeros out the block pointers in the inode, whereas
ext2 just marks these blocks as unused in the block bitmaps and marks the inode as "deleted" and leaves the block pointers alone.
Your only hope is to "grep" for parts of your files that have been deleted and hope for the best.
If you lost power, and corrupted your filesystem, the ext3 journal should get the filesystem back to a consistent state. You could also run fsck to attempt a repair. If your drive is physically damaged, you can't use a program to recover it.