For the past few months, the API of microblog site Twitter has been used as the basis for many popular and creative mashups. Now Facebook, with the launch of its highly anticipated Open Stream API, is attempting to gain some attention as a platform for social networking applications.
A brand new iOS messaging/social app called Peach has rocketed in popularity since launching last Friday. A developer has reverse engineered the Peach API and created clients for Swift and Mac. The clients have been posted on GitHub for developers interested in using the undocumented Peach API.
Google this week released a new API for Friend Connect (our new Friend Connect API Profile), its relatively new service that enables social networking features to be easily added to any existing web site (utilizing copy and paste code that leverages OpenID, OAuth, and OpenSocial). The API allows developers to tap into some of the core features of Friend Connect.