Flickrball
This is very neat: Flickrball is a Web 2.0 game. It combines the Flickr API, some nice DOM Scripting and six degrees of Kevin Bacon.
It really showcases the small-world network nature of sites like Flickr. It begins with a selection of photographs tagged with a word, say "Kevin". You then have to click through to find photographs tagged with other words until you get to one tagged with another word, like "Bacon".
I defy you to come up with faster path than this one of mine, with a total of 11 clicks:
kevin > drinking > party > kitchen > breakfast > bacon
Illustrations
Thanks to the magic of machine tags, you can illustrate this post by tagging a picture on Flickr with:
