Introducing geofences on Flickr http://blog.flickr.net/en/2011/08/30/introducing-geofences-on-flickr/ …
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Introducing geofences on Flickr http://blog.flickr.net/en/2011/08/30/introducing-geofences-on-flickr/ …