Facebook posted to its blog what is the result of one of their annual Hack-a-thons. This year, it's Friendship Pages.

They contain the public Wall posts and comments between two friends, photos in which both are tagged, Events they RSVP'd for together and more. You'll be able to see a friendship page if you are friends with one of the people and have permission to view both people's profiles.

So far it appears that there are mixed reactions. Some think it's a creative feature that will aid in keeping track of multiple friendships and activity on Facebook, while others think it's an invasion of privacy -- especially since others will be able to see your own Friendship Pages and vice versa. I happen to think it's a pretty nifty idea, but I do see where the privacy concerns are coming from.

You can access your Friendship Page with a person by clicking the link under their profile picture, though I believe the feature is being rolled out. You'll also see the link underneath relevant posts.