Check out this freeware app Djay. Its a virtual turntable system that makes live recording/remixing really easy And it integrates flawlessly with iTunes, even turns your album art into the vinyl, pretty cool. I'm no DJ so I don't really know if it's good. Any of you PhilMUG DJs want to give it a spin and comment on it?
Tried this app already. Cool interface. But it could be better. You can do beat juggling but you need a touch screen to really make it work, for me at least. I hope this thing will have scratching capability soon!
I'm no DJ either but I had fun with this for the last 20 min and the interface is very slick indeed, keyboard shortcuts make it so much easier and you can put little "cue point" stickers on your "vinyl" to help you beat match visually. Well done!