I would really like the following features on the iPhone.
1) A shortlist of current books that I can manage. This would allow me to quickly access the books I am currently working with. This list wouldn't necessarily be the recently accessed book list since I often open lots of resources when I am studying something spcific. This feature would be similar to what I do with layouts on the desktop.
2) The ability to see the whole book title in the library list. When looking through some of the commentaries it is difficult to see which commentary you want since the titles are so long and start off with the same words.