Uh, I turn pages by swiping with MS Reader *and* Mobipocket on my HP Tablet PC.
(Also on Adobe Reader but since pdf is a pretend paper format not an ebook format I don't read books on it.)
The OS provides customizable gestures I can assign to any function. I set the swipes to page up and page down. Works with any application, even MS Word in reading mode. That's what full Operating Systems are for, as opposed to cell-phone OSes.
