It seems the initial launch of Warhammer Online: Age of Reckoning has been reasonably successful with half a million people already registered in Mythic Entertainment's MMORPG. Apparently that makes it the fastest selling new MMO of all time.

"In just one week we have a half a million people playing WAR online, and the ranks of Order and Destruction are growing at a record-breaking pace for a new MMORPG," said Mark Jacobs, co-founder and general manager of Mythic Entertainment. "We spent years working to provide players with the most stable, epic, and polished online world we could, but it is the players that have truly brought the Age of Reckoning to life."