The awesome monstrosity you see above is the iDJ Live, a set of two turntables and a control panel that also serves as a dock for your iPad. The device is manufactured and sold by famous DJ supplier Numark, and it features the ones and the twos, a cross fader, and a hookup to any sort of sound system you want. Obviously it's set up for the iPad, but it works with the iPhone as well.
The device works with the djay app available in the App Store for both devices, and it's only $100, surprisingly inexpensive for what it offers. We haven't gotten hands on it yet, but if you're an aspiring iPad DJ who could use something a little more tactile than the iPad's touch screen, this might be just the thing.