Facebook, a formerly 'closed' American social network, is open. Open to anyone, but they also released an open API recently. Not many Dutch profiles, so I don't have friends yet;-)
"Facebook is now offering open APIs for people, friends, hptos and events! Can life get any better than that! Think of all the coolio things that can get done now! Legally - without any mishigas. A full 6-12 months ahead of schedule Facebook has - in a single blow - broken open this whole game. Now the race begins to build out services and applications (even content) around these APIs. Anyone wish to guess on how long it’ll take MySpace and Bebo to respond? Now I hate to say I told you so - but…... I TOLD YOU SO!"