Turn your iPad into a 3D controller
http://www.maideinc.comCurrently Windows only with support for Google SketchUp and Rhino. Mac support coming in the next week.
Here's some promo codes for the App Store:
96K9347XTTFK 9TFJM7Y6EWK3 ATYRLFRLXRFW M7WFMKYR6743 XJWAKAK6YJA3