Music Mashups in the Yahoo! Directory

Splice
Record sounds, compose songs, listen to music, make friends and remixes, all through your browser window.
www.splicemusic.com
ccMixter
Community music site featuring audio licensed under Creative Commons, allowing users to listen to, sample, mash-up, and share original tracks and remixes.
www.ccmixter.org
Mashuptown
Blog providing links to music mashups, with a weekly top 10 list, and news about the mashup movement.
www.mashuptown.com
Wikipedia: Bastard Pop
Overview of bastard pop, the musical genre which combines the music from one song with the vocals from another, usually from a different genre. These edited songs are also known as bootlegs, mashups, blends, cutups, or remixes.
en.wikipedia.org/wiki/Bastard_pop
beatmixed
Blog by DJ/remixer Matt Hite, featuring news about mashups, releases of new tracks, and links to mashers.
www.beatmixed.com
Remix Reading
Artistic project based in Reading, UK, with the goal of bringing together artists (working with music, video, images, and text) to share their work under a Creative Commons license, be inspired, and create remixes.
www.remixreading.org
Get Your Bootleg On
Message boards for sharing bootleg songs, also known as mashups or remixes -- tunes created by blending vocals and music from two or more different songs.
www.gybo.org
Mash-Ups.co.uk
News about music mashups and audio downloads of tracks made by blending multiple existing songs.
www.mash-ups.co.uk
Remixfight
Online community hosting bimonthly remix competitions, in which competitors make new mixes of the same original song.
www.remixfight.org
Boot Camp: Mashing for Beginners
Tutorial explaining how to make mash-ups or bootlegs, created by mixing together two or more records to create a whole new track.
www.paintingbynumbers.com/bootcamp
Smashups.com
Each Smash-Up song is half of one hit song, smashed together with half of a different hit song. Includes audio clips.
www.smashups.com
Mashculture
Mashup blog with downloads, reviews, and news about the world of mashups and remixes.
www.mashculture.nl/english
Salon.com: Bootleg Culture
Article by Pete Rojas on how powerful computers and easy-to-use music editing software are challenging the conceptions of music authorship and creativity. Discusses the issues surrounding bootlegs, or hybrid tracks that mix together other people's songs to create new songs that are at once familiar yet often startlingly different.
www.salon.com/tech/feature/2002/08/01/bootlegs/index.html
Nemozob
Stream these beautiful mashups of Nick Drake vs. Marvin Gaye, Beastie Boys vs. Led Zeppelin, and more.
www.nemozob.com