Using a controller I built, Sparky, and a brushless add-on board I test two different gimbals. The UG-2 from aglhobbies and the RCTimer 2-axis gimbal from uavobjects. I'm fairly pleased with both although there is a little under-compensation in pitch and it was pretty windy.
See here buildandcrash.blogspot.com/2013/05/sparky-brushless-gimbal-controller.html for a more complete writeup.
Music: If I Can't Dance It's Not My Revolution by Quantum Jazz (quantumjazz.net/)