Sharing playlists
XSPF - the XML format for playlist sharing is increasingly being adopted by the next generation of online music applications and website. The 'applications' page on the XSPF website lists a good number of applications, websites and libraries that provide support for XSPF. In this mix are some big players such as Last.fm, Webjay, Yahoo Music.
An effective way to share playlists is one of the 'killer apps' of the celestial jukebox - and for that to happen we have to agree on a format for sharing. I think we've reached the tipping point for XSPF - it will be the format of choice for sharing playlists in the celestial jukebox.