have javascript talk to the cookie easily geolocation functions: nearest context distance geofence geocron 2d conversations - down AND across DemocracyMap - the platform for Open Politicians. PublicDrop.org. Snap a picture. Geotag it.
It posts on PublicDrop.org, and Craigslist, and Twitter, and Facebook, and SMS if people are tied to a Geofence. An item is sitting curbside for pickup. Users can mark an item as picked up. Users can put an eye on the item.