What the Node.js library for Beats Music does for a developer is to authenticate into an application or framework that supports Connect-style middleware. It is named Passport-Beatsmusic by Mark Purugganan. This passport is a strategy to authenticate using OAuth 2.0 API. Resources of this project include line of code for installation and instructions to configure and authenticate requests.
There have been a lot of new socially based mashups showing up recently. In fact, we recently topped 700 social mashups. While many of these use the Facebook API or Twitter API, there are many more social APIs. The mashups below run the gamut, though, yes, also include Facebook.