This National Motoring Database is an interesting work in progress by OctaneGuy … you can enter your location and MINI details, then other MINI owners can find you. It would be great for identifying a MINI you spotted, or for organizing local gatherings.
Unfortunately at the moment it does not work properly for New England, because it is confused by the leading “0” of our zip codes … but hopefully it will soon be improved, and have lots of MINIs registered!