Thanks to Greg Peters who mentioned this link today:
Flickervision dot com
A website showing realtime geotagged Flickr pictures.
This awesome mash-up(In technology, a mashup is a web application that combines data from more than one source into a single integrated tool; an example is the use of cartographic data from Google Maps to add location information to real-estate data from Craigslist, thereby creating a new and distinct web service that was not originally provided by either source.)
) by Dave Troy is the ultimate geo-photo fun! And it’s hypnotic to watch!
Here's a little you tube piece explaining mash ups.
So, you've learned something new today!