Alex King has made available code that creates an admin UI for using Post Formats. While working on their upcoming new theme, FavePersonal, the CrowdFavorite team created an admin interface for post formats that takes advantage of custom fields and replaces the built-in radio button post format selector with tabs across the top of the post editor. Judging by the comments and tweets, it looks like a lot of people would like to see this end up in the core of WordPress.
Alex King Releases Post Formats Admin UI Code
I know I would like to see this implemented into the core. Heck this would even make a great plugin.