I dont think SONY will produce an open beta, i think they will just go straight through to launch. The closed closed beta has gone on for so long and they and recieved much feedback and have changed accordingly so i dont think there will be any need for an open beta. Sorry guys.
it would be nice to get into the beta, but i think i would be bored since i wouldn't be able to interact with my friends unless they got into it as well. Probably best to just wait anyway and see the finished product.