spell with flickr

Clockr: http://www.quasimondo.com/clockr.php

Spell with Flickr: http://metaatem.net/words/

a lot of great interface tools using various languages including; rails, ruby, ajax and java

this one you write a word out and it builds it from images on flickr of those letters.

Lots of others

Tagnautica:
http://www.quasimondo.com/tagnautica.php

Phrasr:
http://www.pimpampum.net/phrasr/

Retrievr:
http://labs.systemone.at/retrievr/

Colr Pickr
http://krazydad.com/colrpickr/

Spell with Flickr:
http://metaatem.net/words/