http://www.themoviedb.org/ is a imdb clone but free and open/run by the community. xbmc uses it for movie lookups if you wish.
just released the first commands and everything is in early dev, but it works.
https://github.com/baddox/watchlist2
edit:
The code's probably not very "pluggable" or "reusable," since that wasn't a design goal :). It's hopefully readable. Feel free to recommend a film (just search for it on the right sidebar).
cool :) I see we took different approaches.
my app's goal is to provide flexible ways of syncing with db and nothing else, at least for now.
I'll have a look at yours. I didn't know about tmdb.