The most desired application/addition for me is voice notes attached to pictures when you use the N900 camera. This is available on some cameras (Nikon D3 & old S4) and extremely useful in a variety of situations.

Specifically, I go to a lot of backgammon tournaments and take pictures of some positions (checker play and cube decisions) for later analysis with software. Having the ability to record a quick note about the position, score, my thoughts or final decision would help immensely later while sorting through tens if not hundreds of pictures trying to remember what went on in any particular position. Not to mention having documentation for both sides in propositions/bets.

An enhancement to any of the recording applications that would add a record button to picture options in camera mode or somehow associate the two would be eternally appreciated.