If you haven't been too MMO-Champ, today, just a heads up. The Client Installer is available, but the servers are not up yet.
Mini FAQ
How do I know if you're in?
Check your email
I don't have any email!
Check your Battle.net account. If it looks like this:
You're good. Download the installer.
If it's not there...I got nothing. Wait and pray.
I CAN'T INSTALL!
You may see this:
To fix it, rename the installer to "World of Warcraft Beta Setup.exe"
See you there