Blizzard
If you don’t have a battle.net account don’t let that stand in the way of your chance to play as registration simple and free, interested beta testers have been advised to download the Diablo III client ( check below for a link) in order to secure their place in the event which is guaranteed to be getting very crowded very soon, so for the best chance to get involved I suggest you start downloading now people. Although it is more likely to be a good promotion idea than an actual beta test seeing as how soon the games full release date is (May 15th) its still a great chance to get some free play on the game.
To download the Diablo III client go to this link https://us.battle.net/account/download/index.xml and follow the instructions, enjoy!