Alex King and the team over at Crowd Favorite have released a new plugin with a different take on post formats. The plugin adds a layer of tabs to the post page, and each format has its own unique layout and custom fields to be filled out. You can view the blog post or grab the code directly on GitHub.
Post types are a relatively new feature. Up until now they have been relegated to a simple list of radio buttons in the sidebar. Perhaps this is the first step in post formats becoming a more integral part of the WordPress experience. The question has been posed elsewhere: is anyone else thinking it might be a good candidate for core integration?