We've got a lot of cool stuff coming, but right now we're concentrating on updating content (fixing errors as we find them,) releasing new content, and adding new features to the next software release.
In addition to new features we are working on for the Mantis program itself, we hope to be able to release a web module soon that'll allow you to modify your notes (and create new notes and bookmarks) on the web site, then have those items moved down to your phone or iPod Touch.