I'm pleased to report I now have a sharable Ratatouille custom mood theme, just in time for Further Confusion! Just download the zip file, follow the included instructions and share the ratty goodness.
Unfortunately, I found out that I am not the first to have this bright idea. If I'd known earlier I might not have bothered with my own project so it's probably just as well. The talented upsa_daisy has also done a Ratatouille mood theme. Theirs is more impressive, seeing as it covers 132 moods and is fully animated. I like to think that mine caters to those who (like myself) find animated moods distracting. Also, mine has a slightly stronger ratty focus.