Robin Good: The Picosteady is a lightweight and low-cost steadycam for any iPhone, small helmet cam like the GoPro or the Hero, and also for many DSLR cameras.
Started through a Kickstarter project it has already reached full funding but you can still chip in to get it as soon as it becomes available.
More info: http://www.kickstarter.com/projects/86612749/the-picosteady-video-camera-stabilizer
Via planetMitch, Robin Good