7 years is nothing...
Yes please do it! You should upload a NetBSD hdf image to Aminet every time a major NetBSD release is out. That will certainly help adoption, and will generate more abundant feedback about it.
My suggestion would be to include all the basic programs for a very low end system to handle (68020+MMU, ECS chipset, paula audio, etc) with clear instruction on how to add the more resource hungry stuff if you have a better system.
Or even better, provide various images that may fit various generic hardware profiles, so that you can choose the more adequate for your particular setup.
