According to the developer in the official ESO blog, ”We’ve started to send another wave of invitations to the ESO beta, as we continue to ramp up our beta program. Invites will be going out over the next few hours, so check your email periodically to see if you’ve been invited to the test. Don’t forget to check your spam folder! We’re looking forward to the next beta session and can’t wait for more of you to see the game.
If you don’t receive an invitation, don’t worry. The ESO beta continues to grow, and we’ll let you know when we send new invites. Thank you for your patience and enthusiasm; we can’t wait to see your feedback.”
The MMO does come with an NDA, so if certain writers are in the beta, they won’t be able to talk about it.