I have been using the Logos App on the iTouch since it came out. I love having access to my books in such a convenient way. After having used it for a while, my number 1 wish is that the books would scroll vertically as they do in Logos, instead of flipping pages.
When studying the Word, or thinking through an article, I like to be able to see the context. Scrolling would allow one to see the context easier than flipping, where you have to move back and forth if the verse happens to be at the top/bottom of the page.
This is a new app, so I expect that they are continuing to refine it. I hope that the option to scroll a resource will be added soon.