TA Discounted rates have been out as of this past Tuesday afternoon. They weren't showing in the morning, but I checked after I got to work and they were there. We booked online for June 4-11, and I got my email back from them yesterday saying the rate was now validated.
There wasn't a lot of availability yet though, so I'm guessing since it's so far out they're trying to keep some availability for rack rates before they release more allotment into TA bookings. We were looking for either Grand Floridian main building, or Contemporary Tower Room, but there was nothing at all for CR and only outer building for GF. YC also shows no availability, but then, YC shows no availability for those dates on Disney's website either (maybe they're trying to figure out how many rooms they'll be working on renovation wise during each week before they open it up for booking?). I think Wilderness Lodge also had nothing. Most everything else seemed to show availability though, except of course AoA Little Mermaid rooms (I don't think I've ever seen those available with TA rates anyway, so that's not really a surprise).