Have you had any problems using this in production? My understanding with using Flash/Java is that all traffic has to be tunneled through port 80 to not interfere with proxy servers. Even then sometimes traffic that doesn't look like HTTP can be blocked. Has this been a problem for you?
I'm using it in production since last week, about 50,000 connections / day. For some reason it seems to stop/crash after 24-36hrs without leaving anything in the logs.
http://cometdaily.com/2008/09/30/why-flash-must-adopt-comet/
http://orbited.org/blog/2007/08/juggernaut-is-a-bad-idea/