I have a virtual cache out at the Arcosanti  (future city)http://www.geocaching.com/seek/cache_details.aspx?ID=31275  , and way I was contacted by them today and they were really happy about the cache being there and wanted to know if it was ok with me for them to do a real cache....  of course I said great go for it....

permission is every thing
We will be known by the tracks we leave behind