I don't think that he needs people who like to be humorous in the beta. I think he needs people who can actually give logical feedback to the beta, and don't just want to be in it to say, "Hey, haha you i got in the beta and YOU didnt, hahahah you suck balls."
Ephialtes is currently looking for / selected people who he believes can actually be of any use in testing, bug reporting, etc. You can't just ask to be in the beta, you will be selected. And if you arn't selected, 2 things:
1. Too loving bad.
2. You have a small window of opportunity when the beta sign up is open.
Anyway, if you don't get selected, big deal, the real RTB 4 will be out soon after the beta. And so, with that, i can ask that people not ask / talk / cry about when the beta / full version of RTB 4 will be out. It will be out when it's out, don't rush him. It's not easy script RTB or design the GUI's or the server. So, before you ask when it'l be out again, think about the work Ephialtes is putting into this, he doesn't even have to do this, he wants to, its a hobby.
This long ass rant is because I personally am annoyied by how many people are still asking about the beta. If you have anything to talk about the beta, it should be suggestions, requests, etc.. nothing else. And i bet that Ephialtes is just as annoyied as i am.