After continued requests for access to more Yelp data, and additional API functionality, Yelp has launched a developer preview of a brand new API. The Yelp API was rebuilt from the ground up. Yelp envisions the new features, data, and architecture will simplify the developer experience.
If you are looking to display social networking statistics on your site, Shared Count just showed up with about the simplest tool you could ask for. Given a URL, the Shared Count API will contact the APIs of Facebook, Twitter, Google Buzz, Digg, Delicious, and StumbleUpon to retrieve their statistics.