Here is the thread I’ve been following in the Scrivener forums:

http://www.literatureandlatte.com/forum/viewtopic.php?f=4&t=29755&hilit=ios

Last word I heard there, from a couple of weeks ago, was that the internal beta had more bugs than they had anticipated, and that they were bringing in a second developer to help squash them (it has been a single developer project, to the best of my knowledge).