Not sure what your vision for Minimal Linux is, Patrick, but I would gladly participate in something like a group posterous, where the emphasis is on short, quick posts & screenshots. I could probably head that up if there was a group of people interested in posting.
My vision for Minimal Linux is basically a Linux version of Minimal Mac. Therefore, I think it meets your criteria. I'm still fleshing out and trying to find others who may want to be involved so I'll keep you posted as things come together.