this really sucks. if someone had stolen from your account PS support would have frozen everything unmtil something could be done- i know this ive been through it.

If its been done through chip dumping then you are stuffed - no way are you going to get the money back.

fwiw, do you leave auto-save password (or w/e its called) working on your computer?
Isnt this how one of the high stakes guys got pwned a while back?
Will PSs support also not confimr the IP address the account was being played from, then you'll at least get an idea of where your account was haxxored from...