Traxus Interactive has released what appears to be the most amazing way to play with Native Instruments' desktop Traktor. He's got every conceivable control built in here, along with a sequencer for the remix decks. Best of all this is totally free! Just fill in a form to download it.
Here is a little sesssion with the template running on two iPads. He's included captions to explain what's going on throughout the mix. There is also a 20 minute setup guide video. This is so impressive!