Open Beta down?

The open beta is currently down for a period of time.

Here's the breaking news currently-

We're in the process of bringing down the beta service for a brief time and will be bringing it back up with gradually increasing concurrency caps. When attempting to log in you may see a variety of errors, and we recommend you keep trying. Thank you for your patience and continued help during this stress test.

http://us.battle.net/d3/en/forum/topic/4661686373