Zacuto's Zgrip iPhone Jr. adds stability to videos shot with your iPhone's camera. Simply snap the iPhone 3Gs into the Zgrip's cradle, grab the handgrip, and you're ready to shoot with a minimum of side-to-side jitter. If you need to lock your shot down, a 1/4 20" thread lets you mount the zGrip onto any tripod. Smooth tilting and panning is only a drag adjustment away.
Please note that the iPhone Jr. will not work if using a case with your phone.