Hi all. The main server has recovered, so we'll be moving back to it shortly. Unfortunately, none of the lobby info from today will be transferred (we're working on a better backup system, sorry!)
We've also released a wave of new features (see http://beta5.tf2center.com/changelog for more information!), including banning players from your lobby, setting up automatic map downloads from our servers where possible (and where it was not enabled previously), and a host of UI tweaks.
The new url is http://beta5.tf2center.com. Other links will be updated shortly to redirect there too, should you have them bookmarked.
Seriously, we'll run out of numbers soon