Last.fm Streaming API

Link: Audioscrobbler :: Development - Last.fm Streaming API.

Audioscrobbler (aka Last.FM) opens up Web Service API to control its streaming remotely from your script or applications. It'll allow you to control streaming (Love, Ban, Skip) within from your player like iTunes if there's a plugin for it. It might also be possible to display cover art in iTunes artwork window or in a visualizer plugin.