Kartoo search engine
At the last Coldfusion User Group where I was invited to speak about Flash Remoting, a member pointed out a terrific example of a Flash application. It is a search engine like no other, giving you visual detail of the relevance of your searches. The size of the symbol represents the relevance and the connections, well the related sites to the specific words you typed in.
The accuracy is also pretty good. I did a search for a site that I recently build and it came back with that site, plus all other sites I have built.
Check it out: http://www.kartoo.com/