Use one for auto-x, the video is decent, better than my still camera's video mode, but the sound is pretty terrible, the wind noise can be overpowering. Not sure the HD is really all that HD when viewed on a tv.
The video format was pretty annoying to work with but realplayer added support for mp4 and now you can do basic cutting down of clips for free.
My stuff on vimeo:
http://vimeo.com/user4270866/videos
Most, if not all, are uploaded in HD.