To go along with this if/when we get subforums to say the retrorides section with the area location. John could create 'groups' the the Kona one but for the area's.
Then people could join their local group(s) and it would be easy to find a list of locals.
I think once it starts we should see how it takes and where it goes. Even the area coverage could be altered to best suit who is actually where.
But there is nothing to stop people looking at more than one area group.
For me it would be The Ridings and like at least four other people whatever Lincolnshire turns out to be we would also look there (since we all live along the Humber).