PUBLIC MARKS with tag playlist

"Hypetape is the illegitimate lovechild of Hype Machine* and Muxtape, where you can create and share playlists containing tracks other people have been talking about from around the internet."

export my iTunes playlists to extended M3u's

Online custom music player search and create your playlists

"La jeune fille aux cheveux blancs by Camille" Intéressant choix de musique :-)

Playlist chillout

"Grooveshark is a web-based music application built for anyone on the internet to listen to music on-demand at no charge. Users have the ability to listen to single songs from the 7-million song catalog, save playlists, and embed both on other websites, blogs, and social media profiles via the Grooveshark Widget." [techcrunch]

A Google Gadget to insert a Flash Playlist. Examples with XSPF and playlist.com

bridge itunes wmp

Pretty much the same thing as Seeqpod, but with a slightly different interface that is supposed to make finding songs faster.

Photo + Son