Google has introduced a Web Share API developers can use to enable sharing capabilities on sites. The API allows users to control how and where data is shared by enabling websites to call on the host platform’s native sharing capabilities. The API can only be used on websites with a secure origin.
Gowalla, the location aware social networking service, has announced the release of their first public API (our Gowalla API profile). This will help them keep up with other location-centric social services like Foursquare's new API.