AJAX photo rotate?

I'm writing a small module to allow simple group albums: single username used by multiple people to contribute to a common album. I'm working on ways to streamline the upload and editing process especially for people who've never used the gallery before and might only use it once. Things are starting to work.

Looking ahead a little, I'd like a way to do AJAX style photo rotate. File upload confirmation screen becomes synonymous a multiple edit screen, and user can edit title and description. I'd also like them to be able to rotate photos in an asynchronous don't-reload-the-whole-page sort of way.

Has anyone done this yet? Is there code already in there that I could poach from? It wouldn't have to be full AJAX, just anything with a non-reloading page.

Thanks!

--nate