Adding An Image To A Custom Taxonomy Term

I would like to be able to associate an image with a custom taxonomy term. Ideally, I’d like to provide the end-user with an interface for managing the image directly on the term itself.

I have worked with a plugin that provides this functionality (Ultimate Taxonomy Manager) – it may be what I stick with. I’m after the best practice, though, and would like to know if any of you have worked through this before and what solutions you recommend.