So part of it seems to be working together: I link to your site with the expectation that you link back to mine. Not a bad idea, also letting the site-creators coordinate who focuses on which sub-topic. But are there many examples of this in the real web?

uh, the webring idea is OLD. Not quite "And some things that should not have been forgotten were lost. History became legend. Legend became myth. And for two and a half thousand years, the ring passed out of all knowledge" old but close.