Last week, Facebook announced an update to the Open Stream API, which allows integration of Page streams with applications.

Now, Facebook has opened up the new Mailbox and Notification APIs, which allow developers to provide users with more ways to interact with core Facebook features within their apps. For example, a desktop application geared toward small business owners could enable users to check their companys Page stream, as well as read messages and receive notifications, all from their desktop, explains Facebooks Ben Hiller.In addition, Facebook has announced a new stream attachment for apps, which lets developers create attachments that users can share with friends via Facebook messages. The new Inbox incorporates the same Publisher used to publish to the streams on the home page and profiles, says Hiller.