I can confirm - 7PM on the 17th. I just got mine. Not at WDW, mind you, LOL, but Fandango already has a few dozen theaters with active ticketing up. A really nice theater about an hour away from me was on the list, so I jumped ASAP. Fandango is already having slowdown issues with folks refreshing, in a couple hours when it's all "officially" open I have a feeling they are going to break the Internet LOL.
One funny thing, I got an error message after my first check-out, and figured I was out of luck. Then I checked, still available, so I did it again. Same error. Good thing I thought to check - the sales actually went through. Or I would have had a third set LOL. It definitely worked, tickets printed and in hand. I just ended up inviting two more friends, but for a split second I had one of those nasty thoughts about how much two tickets are going to go for on eBay for the first showings...LOL. Inviting friends instead wasn't a difficult decision, but I would be lying if I didn't think about picking up more extras.
I have a feeling a lot of folks are going to do that - my prediction is that they will have massive early sell-outs, and then theaters are going to start adding more and more shows over that next week. I wouldn't be surprised if some theaters go 24-hours just to keep scheduling Star Wars shows. I know theaters that did it for TDK (I saw a 3:30AM show) and I'd be willing to bet that eventually everyone who wants to see Star Wars that first week or two will be able, but a lot of folks are going to spend a whole lot of money to be among the first that is going to make the price for the Disney event look darn attractive, LOL.