I'm really sorry to hear about the hack, and thank you for letting us know. I know most folks in UC tend to lay off the forums, but I've passed the message along just in case.
Regarding doing something about the hacker: since it sounds like he's already aware of how to use proxies, passing his IP around for other forums to ban him might not be worthwhile, BUT, contacting his ISP, even if he is in another country, seems like a worthwhile action to take (even if hacking isn't technically illegal in his country, it often IS still illegal within ISPs' TOU).
Best of luck, and I'll look forward to seeing the new digs.