Social sharing site Digg is preparing a version upgrade to its API. Along with its flagship site's major redesign, which is not yet public, Digg will launch v2 of its developer platform. However, there are new digs for Digg developers available now, with documentation, language kits and what will likely become an app gallery.
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.