Leah Culver, the lead programmer of Pownce, has informed us that the messaging/social networking service will release a more complete API this Friday, one with substantial improvements over the first version released late last October. This second version will include the ability to post notes and replies, fetch private and friends-only notes (in addition to public messages and user information), and upload and download files. OAuth support will also be rolled out, allowing users to protect their Pownce data when using API-based services. Services built on the API will be publishable in a Pownce directory where users can find them more easily. Culver says that API 2.0 is powerful e ...