I think that it would be great to be able to view notes that were typed with a specific pdf or powerpoint slide. I essentially do that now but it would be helpful if you were able to duplicate the kind of experience that you get (with added audio of course) when printing powerpoints for note taking from ppt.
Maybe even just an option that would highlight all of the notes written during a current slide or pdf page would be helpful.
Or possibly an option to have a larger pdf viewable while typing notes and when the pdf page is changed the notes stay with the pvs page. So with each new page you have a blank area to type text.
Just some thoughts