Love this!
I developed a "live" view of South African places a couple years ago which presented Instagram and Foursquare photos taken at popular South African places. http://safindit.co.za/live
I've also since used IFTTT to drop photos from Hawaii, Phi Phi etc in a Dropbox folder for me every morning.
Spots is a near perfect implementation of the idea. Congrats.
Spots
Spots