I've been collecting a wish list of features while trying out this software. Sorry to post this as a list, but I don't have time to put them in individually. Thanks for the great piece of software! I wish I had this years ago and will be buying very soon.
Auto-save at intervals set in preferences.
Set default font preferences (spacing, font size, font face, etc.).
Pages-like formatting toolbar.
Drag-and-drop editing.
Show total time in toolbar.
Show total slides in footer (before previous and next buttons).
Thumbnail view of slides (for easier navigation while recording).
Undo capability while recording slide progressions with audio (for those times when I or my instructor accidently hit the wrong previous/next button).
Active linking to slides, so that changes in original slides is reflected on the fly in Pear Note.
Pages-, OmniOutliner-like editing features (or become an add-on to Pages and Keynote), especially styles for lists, paragraphs and characters.
Annotations to slides (pie-in-the-sky).