TerminatorX is a bit of Linux DJ software, and it works with a build-it-yourself turntable controller, which is basically an old mouse connected to the turntable. There are plenty of haters here at EM411 and over at Hack A Day (it looks like you 'scratch' by moving the entire platter, not the slipmat) but - as one pundit says - " i don't see you n00bs hacking anything"