This Weekend, Everyone Can Play Diablo III. Even You. And You.
Luke Plunkett, kotaku.com

Lis­ten up. From noon on Fri­day, April 20 (Pacif­ic) until 10:00am (Pacif­ic) on Mon­day, April 23, Dia­blo IIIwill be in open beta. Mean­ing any­one with a valid Battle.net account can get in on the action.

To down­load the client