del.icio.us has a very cool new feature that turns any link to an MP3 file within a webpage into an interactive and embedded media player. playtagger gets used by including a simple <script> element onto your webpage, which in turn replaces all anchor elements that point to an MP3 file into a small Flash-based media player.

Pandora is a web-based service that helps you discover new music. The web app is a Flash RIA that asks you to type in an artist whose music you like, then based on an alogrithm created by the Music Genome Project it chooses artists whose style is close to that of the one you entered. It’s really quite remarkable and worth checking out.

The service is available by subscription (only $36 per year) or alternately by a free, ad supported player.