The Mashable Team has a great new toolbox: Online Music: 90+ Essential Music and Audio Websites.

The list includes sites for:
• Internet Radio
• Music Discovery Tools
• Social Networks
• Music Marketplaces
• Jamming sites
• Karaoke sites
• Remixing sites
• Mobile Music Services
• Music Charts
• Artist Databases
• Lyric Databases
• Music Search Engines
• Audio Conversion Tools
• Miscellaneous Music and Audio Tools

An amazing music resource.