M.C.
It sounds pretty normal to me. My daughter was extremely verbal at an early age, and they just repeat the words they know over and over again. (while in the car all I heard over and over again was, "mommy, where going?" it was enough to drive me insane! she didn't care about the answer, but just repeated the question.) Its annoying, but really a good thing. He'll be telling you EXACTLY what he wants in no time. Just keep talking to him, so he expands his vocabulary. Two year olds get really frustrated because they know what point they want to get across, but don't know how to do it. Have you though of incorporating a few baby signs?