My article was rejected as an article suggestion, but recommended as a good idea for the Site Talk forum, so here is a link for anyone else who is interested in starting a movement to get a community-wide (ATP) Seed and Plant Exchange going:
The thread "ATP Annual Seed and Plant Exchange Idea" in
Site Talk forum
Please take a look and read through it if you can. I put a good amount of time into thinking about it logistically, writing up the article, and editing it.