Multiplayer beta testing is now underway for Warhammer 40,000: Dawn of War II - Retribution, THQ's RTS expansion. The beta is open to everyone who purchased a Dawn of War game through Steam of has registered a Dawn of War II product on the Valve service. Others can gain access by registering on the Dawn of War Community site and following the instructions under the Beta Key giveaway tab. Here's word on testing: "Featuring all six multiplayer races including the new Imperial Guard faction, the beta will run through the end of February to test the new Steamworks network and matchmaking features and help balance the multiplayer mode. All new units for each race will be available in the beta along with the new multiplayer maps that will ship with Retribution." The beta is expected to run through February 24.