I think late next summer may be a bit overly cautious, but I wouldn't think that we'd see anything until early spring at the earliest. Yeah the Reader's been out a while, and we've given them a lot to think about, but they have to decide which things they can/will do, and actually have time to do
them ... I think maybe Feb./Mar. for my guess.
If they'd fully opened the OS to users, I think we'd already have had at least 2 updates by now.