The roll out:
The beta is going to roll out in waves. Rather than just putting a million people in the beta and hope nothing goes wrong, we will ramp up the playercount over time.
As fourzerotwo mentioned, right now some friends/family are testing. The press will be joining in the next couple days -- including those of you who make it into the first wave.
No worries if you aren't in the very first wave (most won't be), we should have a new wave of players every day or so as we ramp up.
Details on how to register for your chance to be in the beta will be posted tomorrow at 5pm PST*. So stay tuned for details, it will be a limited time offer.
*= this may not be the only way to ever get in the beta, but it is the way to have a chance to get in the early waves.