If you're into mashups have a look for the Cut Up Boys. They used to do a half hour set on Radio 1 on Thursday nights. I never thought you could play Dr. Dre and the Spice Girls together but it turns out you can. They released a compilation on Ministry of Sound but all their best stuff was usually live so you had to record off air. I've got a dozen or so recordings from their stuff on Radio 1 and also a lo-fi copy of some sessions they did for Studio Brussel.