For version 9.0 we plan to have ePub format support. A rebuild of the file loading tab is on schedule as well to make the tab focus more on the searching tool.
For version 10.0, we are pondering adding Google Doc's to speech. We welcome feedback on the usefulness of this feature.
As Real's feedback shows, we depend on your feedback to make pdf-to-speech a more useful tool for your every day needs. You can post your feed back as a comment on the Android or Amazon market, on this blog, or at Pdf-to-Speech's Google+ page here.