The guys behind the UT2K4 Alien Swarm modification have announced a new version (1.32) of the game, to fix some outstanding issues, improve voting and add further maps.

"We’ve released a new version of Alien Swarm to fix some outstanding issues and add support for more custom maps in the voting menus. The number of custom maps for AS has increased a bunch thanks to the release of the Escape from Rhea campaign,".