I've been checking out the dotNetNuke site. Is anybody using it? Is it a real Content Management System (CMS)? A few comments: it's seems sort of sluggish and some of the modules don't seem to work. Apart from that I like the idea.
This could be easily done in AVFP as well. If anybody was interested in doing this, I'd contribute the following modules: shopping cart, discussion forum, survey, but, someone else would have to do the bulk of the work putting it together...