I know this thread is so old that the opener must have recovered his data back. However, I come here for sharing my experiences of data recovery with you.
Last month, my memory card of the Samsung galaxy S I had strangely become RAW. Consequently, all my phone contacts, photos and music inside it also were inaccessible. It was really horrible. So, just like you, in order to recover the data, I tried every possible ways, just like a crazy fool.
Finally, I restored all my data back with the help of a free memory card recovery tool
that was highly recommended in some forums. I remembered it offered a special “Deep Scan Recovery” option to cope with the similar RAW recovery problems. It was indeed a nice shot!
So, if someone encounters the similar recovery problem, he can download this freeware: http://blog4mark.blogspot.com/2013/01/memory-card-recovery.html