I’m developing an e-book reader to read my e-books in Android phones… It’s no a pdf reader only, but a e-book reader that gets the structure of the file to show it on the screen. So I avoid to scroll the screen horizontally and vertically.
The project is in the begin, but you can access and try it on your cellphone trough sourceforge: sourceforge.net/projects/mbreader.
I’ll try to keep here updated with the evolution of the project and post my impressions relative to android development.
Regards!