I just bought the Koday Zi8 and have been experimenting with that and Sony Vegas editing software. I am using Sony Vegas to do the zooming instead of the Zi8 since zooming with the camera can be a bit shaky, even on a tripod.
Both Steve Fidyk and John Favicchia taught clinics in Richmond this month. I did the videotaping for both and I found it interesting that so many drummers are using the Zi8. It seems to be a drummer's camera.
Here's some footage of the Zi8 from Steve's clinic. Note that the Zi8 is one of the only cameras in it's price range that have the ability to accept an external microphone (however the video below was recorded with the Zi8's internal mic and sounds very good).