I'm thinking people will be phased in over the 4 tests that make up beta 3 so if you don't get in today, you will be joining in subsequent tests as part of this beta.
The reason I think this is that legacy players until yesterday believed they were going to have access to their legacy characters from the start of beta 3 because everything written everywhere said version 1.0 characters would be available in beta 3. Yesterday we found out we are not getting access to them until test 2 of beta 3.
By breaking the beta down into components, they can still let all version 1.0 account holders access during beta 3 but do so without blowing up the servers.
I am sure you will all be in shortly.
I have a feeling you are right. I was totally expecting when I posted to be followed by like 40 more posts of getting in... but apparently not. I saw a couple posts on the gamefaqs forum, but not much else, so I feel like they are just sending out very small batches at a time. I'm hopeful this isn't the case, as I understand how frustrating it would be to have to wait longer. Keep the faith!