Pydora is a Python-based implementation of the Unofficial Pandora API. While Pydora is fairly complete, it doesn't include any of the undocumented features, or most of the account management features, of the API.
How does the Web's largest ticket search engine improve its API? By giving developers easy access to more information, of course. SeatGeek recently made links to artists' Spotify and Last.fm profiles available through the SeatGeek API, and the company promises even more data in the future.
Somewhere out there is a singer-songwriter who could use your code. And who knows, that artist--or one of the other more than 10,000 on ArtistData--might even pay you for it.
ArtistData is a site to help musicians store their information and reach out to fans in the shortest amount of time. For example, enter tour dates once, then publish to MySpace, your website and send local media alerts.
The Echo Nest API, a suite of web services for music search and recommendations, officially launched at DEMOfall08. As they say: " Input any song and get an XML description of its content." It's a very intriguing API that's increasingly attracting the notice of the developer community. Paul Lamere exemplifies the excitement Echo Nest is eliciting in his recent Sun blogs post "The Echo Nest Developer's API.