This is cool, that's what we did with Content Blocks (http://wordpress.org/plugins/sizeable-content-blocks/) and made things even more flexible with Content Tags (http://wordpress.org/plugins/sizeable-content-tags/).

Nice work! Looks like Buckets has a nice following and similar functionality. Blocks are just general ways of creating re-usable and flexible content and Tags are a method of relating all content types within a user-defined context.

We use them all the time!