You need the Apple Camera Connection Kit to plug the microphone into your iPad, so yes it is compatible. That is why I purchased this microphone and I have never had a problem connecting it to my iPad "3".
Yes this works if you have the Camera Connection kit as was observed by another poster. I have tested this and the only thing is the audio appears to be routed via the earphone port on the Samsung Mic as well. NOt a big deal perhaps, but something to be aware of.