Basically, it's just a way to connect all the Xterra related websites who want to participate. If you click on different parts of the webring graphic it will take you to what you select. So, if say, you want to go to my underviewed website and can't think of the address, you could click on "list" and search through there and find Aftershock Xterra Adventures. Of course that would not take you to my newest version since some asshole hacked the upload page and I can't get my new pages loaded!
Anyway, I highly recommend you click on the graphic on Schlud's site or wherever and look around.