As far as field rotation is concerned, I have not implemented it yet, but it is in my plans for the near future (when I get my Canon 400D).
So far I was using B/W Quickcam for shots up to 30 secs focally, with tracking and no guiding, and there were no problems observed :-)
Afocal avi's with my Kyocera were also OK :-) I had bigger problems with atmospheric turbulence and vibration (after touching something) than with tracking.
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