I can't say for sure that The Secret World (TSW) is going to be starting up some sort of beta in the near future, but yesterday it opened up a thread that lead people through a special video and then to a site which required you answer a number of questions in order to get access to a special code. A duplicate of the original message (which has since disappeared) can be found here.
It's a bit more interesting than just filling out a beta application, that's for sure.
If you can't get the answers, look around - there are a number of locations I've seen with answers listed.
Despite being from Funcom, TSW is interesting to me because it is doing something different in a genre that really hasn't seen a lot of attention. We'll see if they can pull it off.