It would be awesome if movies and TV shows were scrobbled to trakt.tv.
They have an API for it .. you would have to contact them to get a developer key, but the developers are really responsive.
movie/scrobble - API Documentation - trakt
show/scrobble - API Documentation - trakt
You would also need to get the imdb or thetvdb ID of the show / movie, I would think that would be done on the application side (Windows / Mac).
The devs of the site can be reached at support@trakt.tv to get a API key.
You can see my profile at tecnobrat's Profile - trakt which gives you an idea of what the site is like.