I think people are getting way too worked up about the beta invite.

1) As Matt said, if you still thought when they announced that 1 million people had signed up for the AP, that each and every one of those folks would be getting full and immediate access, then you weren't doing much critical thinking. Even if they assigned us servers, that'd be 1/4 million per server with no stress testing at all. It would have been an absolutely horrible experience, and I would rather wait my turn than deal with that.

2) I get that the wording was confusing, and it's frustrating, but it's hard to blame Blizzard for not knowing how extremely popular the deal would be. I suppose we'll just have to survive with our free mount, and 100% free copy of Diablo III. How terrible!

3) I have to say, that if you go into the game thinking to yourself: "Hey! I get a head start on playing the new expansion! Yay!"...then don't download the client. I seriously feel that has the potential to completely ruin the experience of the expansion for you. Because of the raw amount of repetition that you'll be undergoing, and because of the unpolished nature of the beta, I guarantee you'll be let down and worn down if you think of this as early access. Add in the fact that you could be doing this without the benefit of having friends to help entertain you, and that can just make the experience worse.

Yes, getting access to the beta is exciting, and we want to all see the new and interesting things that come with it...but that's not the purpose of the Beta, and people need to remember that. The more smoothly that the beta goes early, the faster we can possibly get to release. Which means the more not only can the AP folks enjoy MoP, but so can the 9-10 million that didn't sign up for annual pass.