I've never had problems with chat in lab before... is thwackcamp using some new provider or something? I must have it blocked on both of our proxies... bummer. I saw the note about it but didn't realize it may be new?
Your request for URL " https://service2.rumbletalk.net/zQ*-*24l/" has been blocked by the Web Gateway URL Filter Database. The URL is listed under category ( Chat), which is blocked.
I assumed it was going to be the same as the labs but this must be some new hosted chat solution or something most proxies block.