GetGlue - Check-in to Entertainment

Put simply, GetGlue is a social network where one can share with his/her friends what are their entertainment activities.
It has the same principle as foursquare where one checks-in a place (or venue) and collect points and badges, only in this case you check-in an entertainment activity and collects points and stickers.
By "checking in" a show or a movie, you share this activity with all your friends. The activities' categories are "watching a show", "Watching a movie", "Watching sports", "Listening to music", "Reading a book", "Playing a game", "Thinking about a Celebrity" and "Thinking about a Topic". More of those are yet to come.