Are the invites done today?
This is something we aren’t likely to answer during the beta test. Ever. There is no predetermined schedule for the rate at which players get invited to test the game.
The Blizzard folk who are monitoring the concurrency trend of people online and playing, as well as the stability of the game servers, will do waves of invites as needed.
Beyond that, there’s really only an extra morsel of information – small though it may be – I can provide as to when invites might go out. They’ll go out, as I said before, when we’re comfortable with increasing concurrent players online. And they’ll typically go out during standard business hours (9 a.m. – 6 p.m. Monday – Friday, North American Pacific time).