I'm working on a little personal/family project that needs to pull movie/DVD info from a service to show cover art, plot, actors, director(s), etc.

IMDb's web services are not open to the public, only for paying customers.

But with my amazing Googlefu powers I found useful, a C# IMDb "API" for pulling that information:
http://code.google.com/p/imdb-api/
I say "API" because all it really does is some screen scraping. It didn't work exactly like I wanted it to, but a couple of changes to the source code was all it needed to make me happy. And using it is a whole lot easier than writing all that screen scraping crap yourself.

I'm thinking that I should try to pull that info from Amazon first. It might be a little more "legal" to do that than screen scraping the IMDb site.