[...]
Looking up some of those addresses at "blockchain.info" returns no find. Try it yourself. This may be totally bogus data.
What addresses? There are no Bitcoin addresses only Gox internal codes.
The data is at least partially legit, probably everything is legit (besides the .exe wallet stealer).
One could look for large withdrawals before the btc withdrawals halt... Another thing would be to check for larger withdrawals by known accounts that are rumored to have known more than the average coinhead (e.g. Bitcoin foundation board members).