check out www.taggalaxy.de. Which should be on the waggledancers bookmarks page for several reasons.

 Firstly because finding the right image on Flickr for a presentation can be difficult and this site makes it much much easiers.

Secondly because the interface is cool and addictive - you'll want to share with others -yup it will make you waggledance!

Thirdly because it gives an indication of where the web is going - this is a snapshot of what some have called web 3.0. At present you have to go to delicious or digg to find the relevant tags. And taggalaxy only arranges flickr tags for you. But in a few months time it will become possible to search for anything and have the tags get you the most relevant content. And the interface will be a lot more like tag galaxy than a google search page. So enjoy tag galaxy.