If you have a little time to kill, you need to check out this wonderful immersive search experience called Tag Galaxy. This is basically a search tool for Flickr images. What makes total sense is that Flickr is a powerful social community. A community which allows people to express themselves and tell their stories through visuals. So searching through the content SHOULD be just as engaging.
First you are presented a simple search box to input your word, or tag if you will. Once you enter the tag, then watch how the system gathers up all related tags and builds a solar system of your search. It is like a mashup of Search, Visual Think Map, and Flickr.
But wait there is more. Keep clicking through to specific words and view deeper detail, and watch the history of your search archive itself on the left hand side of the screen. Nicely done!