Printing Facebook is a web based service that is offering print services based on the Facebook social network.
Their first product is the Friend Poster. Essentially, you allow them access to your Facebook profile and they would take a snapshot of all the profile images of your friends.
These images are then printed on Fuji Crystal Archive photo paper in a RA-4 photochemical process.
The poster size is 20 by 40 inches which is suitable enough to handle as many as 2200 friends. Image sizes are relative to the space available on the canvas.
Great concept. They might face some trademark related issues with the company though. Facebook is not a very big fan of third party services that uses their branding.