Blizzard announced this weekend it will hold an open beta for Diablo III. Anyone with a valid account can try it out! "Beginning this Friday everyone is invited to log in and help us put the game and servers through their paces in this three day stress test as we march toward the game's release on May 15," Blizzard said.

Head here to begin downloading the Diablo III beta client. 

From Friday, April 20 at 12:01 p.m. PDT (noon), until Monday, April 23 at 10:00 a.m. PDT you'll be able to log in, team up with friends, and play each of the five heroic classes to level 13 as you fight to save the world from the impending demonic invasion.

Blizzard also posted a FAQ that can be read by clicking here