RSS, OPML and the XML platform.
Copyright 2012 World Readable
FriendFeed has released a v2 of their API. Check out Scoble and Dave Winer's conversations. I always considered FriendFeed a nuissance. It seem to get popular fast and disappear even faster. Now, I rarely see it anymore. Looks like a great API, but I've never understood the usefulness of the website.