Hey,
to my knowlege this is currently not support but airplay with Apple tv is working.
But to your question I can give you an alternative: Use Cross DJ Free and the U-Mix Remote App for iPad. You can look here to get more information:
http://www.mixvibes.com/content/product ... emote-ipadThere you have the audio and software on the computer (or mac) and connect via wireless lan the iPad as a MIDI controller.
But this is only an alternative and not like the CrossDJ App on the iPad so let us wait for a answer of the support of MixVibes.
Thanks
Christian