I recently found that the Dresden server is up and capable of hosting round-robin matches again. (It doesn't have a hostname at the moment, and I don't want to link directly to an IP address, so reach it via the first link on this page.)
The Dresden server is different from Tiltyard in that it has a wider variety of games, somewhat less curated than Tiltyard's selection in terms of the GDL and ease of processing the game descriptions. Unlike Tiltyard, Dresden will have gamers play pretty much every game it has.
