Developers can easily integrate with the Napster third-generation friendly API and SDKs used by hundreds of partners and businesses worldwide. The API features OAuth 2.0 support, data services including metadata, search, playback, library, account, commerce, extract, and download, personal recommendations, session management, and more. Interested developers can contact the provider through a form on the business services page.
There are now 11 Rhapsody mashups listed here with more coming soon. For the ClearForest contest we're adding more entries today and tomorrow's blog post will give you the details on the winners from that one.