Stan & Pete, On Friday night last (12/07) I used my Audio Technica Pro 24-CM mic to record the audio for a choir performance at the school my grandson attends. The quality of the recording, while certainly not suitable for a professional video, was quite satisfactory and much better than the internal mic of the D7000.
The Nikon D7000 is obviously a fairly complex camera, and I'm still learning some of the settings for video (I only received the camera the day before the choir performance). So, some of the video I recorded wasn't quite as good as I wished. I had apparently fumbled the focus as I tried to adjust the subject coverage and, as a result, had some soft focus in the last part of the video.
I really am mostly a still photo person, and I'd expect to use the video capability of my D7000 only on a limited basis. It's still a very nice capability to possess on a camera that is very exciting to use!