In fact, you've been able to register for over a week, I just didn't notice until today. Last year it sold out, so if you already know you want to go, start making your plans now. If you register early you save money, there's some sort of sweepstakes to be won, and you'll know one little part of your year plan well in advance. Go on, register.
Me? I'm hoping to be there as a speaker (I submitted a number of C++ talks) or to take advantage of some not-yet-announced-I'm-just-hoping pass for RDs or MVPs or INETA speaker bureau folks or something, so I haven't registered. One way or another, I will be there.