chakru said:I reported his url to pirate reports lol..
Rofl, quality.
Also, you guys are saying everything I would've said, which is;
Report to piratereports (if hes a hacker, i doubt he has a legit vB)
Report to his hosting as people have said
Hes emailing your members, you email them back, using the inbuilt feature in vBulletin, tell them that the new domain is a hacker and ask them to all change their passwords.
Your database will be useless in his hands, he can get shut down for using one that isn't his property anyway.
Take out his nameservers, no nameservers, no site.