Looking at the list of forum groups and subgroups I don't see any subgroup dedicated to a single eBook reading app. I'm sure if you counted up all the threads and posts for some other eBook reading apps some of them far exceed 1000 posts. So I doubt they will give Marvin its own subgroup.

Having said that, one thread with 1000+ posts is a nightmare to keep up with. Too bad they don't break it up into subtopics. I'm interested in Marvin when it comes out for the iPhone, but I gave up on that single thread idea way back when it was only a hundred posts or so. Especially since it was mostly one blow hard who managed to make almost half of the posts, and he isn't even connected to the app's development. Perhaps that has changed now, but it isn't worth the time and effort to read through 900 more posts to keep up with it.