There is quite a lot of information and sleuthing that has been done. If push comes to shove, we can all pool resources and initiate an official investigation that results in legal action. This would come with international wire fraud charges though, which would result in significant jail time...because based on the sleuthing thus far, it's believed that the culprits live in Malaysia. That being the case, it'd be a lot harder to see any restitution made to all of us, so I'm content to let him try and make good. But he isn't trying very hard. Also, he's apparently accessing Bitcointalk.org via the TOR network and still using anonymous e-mailers, so definitely still taking great pains to try and obscure his identity.

I would think the admin of BTC-Arbs would be HIGHLY motivated to avoid people digging deeper...but the lack of communication and the speed of payment thus far don't seem to indicate that level of urgency. Yonce is right, one of the people I know of who was responsible for uncovering a great deal of information was immediately paid in full.