Boinx has released an update to their iStopMotion App for Mac OS X that allows you to use your iPhone, iPad, or iPod touch as a remote camera for their desktop software:

Turn your iPhone, iPad or iPod touch into a versatile HD camera for iStopMotion for Mac with the iStopMotion Remote Camera app, available free of charge from the App Store. iStopMotion Remote Camera transmits a live video feed and supports 1080p remote capture with the iPhone 4S and the iPad (3rd gen.), and 720p with iPhone 4, iPod touch (4th gen.) and iPad 2.

source: Boinx iStopMotion for Mac