We've made some changes to the login server, however these changes didn't quite stick. You will not be able to login without doing the following:
Before you start, please make sure the WoW beta client is not open.
1. Navigate to the following folder in your beta install.
2. Open up your realmlist.wtf file with a text editing document.
3. Change the "set portal public-beta" line to "set portal public-test"
4. Save this change.
At this point you should be able to login normally.
**This folder will differ depending on which language you installed WoW Beta with. For example if you have a German install, the folder will be deDE.
If you still have issues with logging in please post here!
Thanks guys and sorry for the inconvenience.