I've had great success with TouchOSC and my iphone for this kind of application.
I made a custom mapping, etc for MixVibes Cross....and although there are plenty of free traktor templates out there, I'll be porting this one over to Traktor as well, with a basic FX page as well.
Soundcard, iphone, laptop. Nice and portable.
http://www.viperfunk.com/free-custom-touchosc-template/
Bookmarks