This week, update 1.5.2 went live for Blizzard's sci-fi RTS, StarCraft II: Wings of Liberty.
The patch includes the usual mix of fixes and tweaks, but much more interesting is the new Arcade feature, which brings access to player-made maps and mods, serving them up with a peer-review system.
For more details on the new Arcade feature, or for a full list of fixes, head to Battle.net.