Although not strictly to do with digital music, it is to do with the digital world, and music, so I figured this might be relevant to some people.

Amazon and IMdb are hardly small names in the online world, so it's nice to hear they have teamed up to create a digital music encyclopedia by the name of SoundUnwound. It's all editable by users so you can expand and change it as you wish. Definitely worth a look if you are a big music fan.