When we're in the mood for a movie my wife and I routinely take a long time to agree on what to watch. Webapp Foundd helps in situations like these as you and your friends maintain separate recommendation lists and when you want to watch a movie together you will receive recommendations tailored to both of your tastes.
After signing up for the webapp you'll need to rate at least 10 movies to give the webapp a baseline to measure recommendations against. Of course like every other discovery engine the recommendations get better as you rate more and more movies. The interface is slick, giving you the movie poster and direct links to watch recommended movies on iTunes.
It's just the webapp if it takes a while for you and your friends or significant other to pick out a movie to watch together. It looks as if Foundd will eventually be moving beyond just movies and offering the same services for TV shows, video clips, apps, games and books. I'll be glad to see each of these implementations with the possible exception of books, as I believe improving upon GoodReads would be difficult.
You can connected to Foundd by Facebook, Twitter, or just email if you don't like giving out access to your social media platforms.