(2010-08-19) Facebook Places
Today we released Facebook Places, a new way for people on Facebook to share where they are, see where their friends have checked in (CheckIn), and discover interesting places nearby. As part of the rollout, we're making Places available to developers via the Graph API, so you can integrate location features into your own mobile applications, websites, and applications on Facebook.
More on the API. Most devs won’t yet have access to the Write and Search APIs; Facebook is only making those available to select partners in a private beta. For example, Yelp, Gowalla and FourSquare will be able to push their checkins to Facebook Places, allowing users to simultaneously checkin to their services as well as Facebook’s.