there is no error message. i've just sat here for 2 hours waiting for someone to join. NO ONE JOINED. and it's footman frenzy. EVERYONE joins footman frenzy.
In short, it seems you can't host. Hosting is not just creating the room lobby, but when you are capable of letting people in. As Ashcat said, it has to do with forwarding ports from your router.
Finally finding about some of the bots that are flooding the users online - bytespider apparently is a huge offender here - ignores robots.txt and comes in from a ton of different IPs
Ghan has said he has fixed this. Monovertex please confirm this fix. This was only a problem with people that had signatures in the upper levels like not the special members but the respected members.