The Djay app was one of the highest acclaimed apps of 2011. It turns your iPad into a full-on DJ system, accessing all the music and playlists from your Music library. The touchscreen interface and “ultra low–latency” come together to promise a professional mixing experience. Perform live, record mixes on–the–go, or use Automix mode to let Djay automatically mix your favorite playlist from your music library.
It’s $20, and I could think of far worse ways to waste time.