I have taken the online test twice. The key, I think, is to take it with at least one friend who knows some different stuff as you. That way you have a better shot at getting to the "magic number" of correct answers (which no one really knows what that is, exactly). I made it to the in-person round in Kansas City both times, but didn't get selected from the pool after that point. I think my scores on that written test were too low. I know nothing about literature and they always seem to stack the questions heavily in that reguard. At least that's how it felt to me! But I still got to "play" the game with two other interview-ees with the clicker button, which was fun. It's as far as I'll probably ever get, personally, but it was still fun.
If I ever get another email announcing the sign-up for the next online test, I'll try to remember to post it here.