A mashup artist that combines multiple songs to create each of his tracks. This is different than DJing. On average, he uses 21 songs for each one of his. His performances are featured in the documentary I posted earlier, "RIP: A Remix Manifesto". It's interesting to look at his music as a prime example of postmodernism and what that all means in terms of copyright infringement.
Open Source Cinema lets you create and / or remix your own videos or other videos that people have posted from places likes YouTube. You can also join group remix projects.
"Immerse yourself in the energetic, innovative and potentially illegal world of mash-up media with RiP: A remix manifesto. Let web activist Brett Gaylor and musician Greg Gillis, better known as Girl Talk, serve as your digital tour guides on a probing investigation into how culture builds upon culture in the information age."