Just announced this week that it was sold out.
But it will open up again a month or so before the ride to resell the tickets from people who bail out, so I suspect anyone who wants to get in will be able to do so.
Black wallnut, have a great time. It's a spectacle and an accomplishment. I did it in one day a couple years ago and enjoyed the heck out of it. Won't be back this year, too many other great rides to hit.