Those who are in the beta are not allowed to mention they are in the beta or mention anything about the beta that hasn't been revealed by the developers in the public forums. Doing so would be a breach of NDA and result in the breach being removed and them penalized.
Rule #1: Don't talk about beta.
Rule #2: Don't talk about beta.
So until the embargo is lifted and open beta comes, you can only get new information from the developers.