@Andreas Nurbo - There are ways in which both freely available and commercial plugins can be handled in the repository but how, I don't know. It's been pretty clear though that Matt doesn't want to mix the two together in the same repository. Which begs the question, why not create a separate page for them? I'm pretty sure Matt answered this in my interview with him at WordCamp New York but I can't remember the answer right now.

I think you've given me an idea for a new post regarding credit links and such.