Feeling Lucky  is a small application created by Bonstio in Google App Engine which retrieves and displays random images. What could simpler? It uses the Flickr API to retrieve a random image from a specified Flickr group.

 For example, here's a random image retrieved using the tags lucky, clover, plant and 4 created using the following HTML.

<img src="http://feeling-lucky.appspot.com/image?q=lucky,clover,plant,4&size=t" title="Feeling Lucky by Bonstio"/>