Just when Debian thought it was running out of release names...
IMDb lists Toy Story 3. There's no list of characters yet and the movie will only come out in 2010, but if Debian wants to continue using Toy Story characters for release names, it will have some more in about two years.
(I wouldn't mind another naming scheme, myself, since I don't like the way Disney does business and stomps on freedoms.)
Edit: Old discussion page.