I would like to review and manage my Aperture library from my iPad

I ride the train to and from work every morning. It would be very convenient if I could use my iPad to organize some of my digital life while on the trip. For example, I have thousands of blurry vacation photos I just can't seem to find the time to organize while I'm home, and it would be great to do this while traveling.

Are there any apps out there that tap into a digital library such as Aperture's and offer the ability to review/rate/delete items only to sync them back with the PC later?

I could ask the same question for iTunes and music - anything out there to change tags with a song and have it sync back later?