Message #52389

[Nathan]

http://www.gamezone.com/products/diablo-iii/news/diablo-3-open-beta-temporarily-capped

There you go. Apparently beta is only available on the US servers for now, so go to Options, Account and change your region to "The Americas". This solved it for me.

You then have to create a BattleTag. The link in-game didn't work for me, if it's the same for you, go here: https://eu.battle.net/account/management/battletag-create.html

I was then able to log in successfully