Why don't you simply velcro a minidisc or something similar to the side of the Nizo? Hit record before you pull the camera trigger, pause it after the shot is done. Or simply keep it running through a series of shots.
It is extremely easy to marry the sound and the image together in post on a good program like Final Cut or Sony Vegas. Preferably you've used a clapper bar -- if not, simply listen very carefully for the starting and stopping of the camera and cut the soundtrack at those points. Then you can easily stretch or compress a little when hooking those to the image, linking it to the first and last frame of the shot. The camera will drift a little, but what are you looking at? 2 1/2 minutes for the longest take? With electronic regulator (most super 8 cameras), drift is minor and easily compensated for with little if any effect on the sound quality.
You're going to get way better sound than the old on film method, and the little bit of extra effort is actually kind of rewarding as an accomplishment the first few times you do it.
Edited by santo, 09 October 2005 - 06:09 AM.