Piclens: Flickr Coolness
Another thing to do with pictures that makes any set of pictures look awesome: Piclens from Cooliris. Piclens is a Firefox add-on that does two things: 1) grabs all the pictures contained in or implied by a page (contained in is just what it sounds like, implied by is grabbing a photostream on Flickr); and 2) displays them on a cool Matrix (architect scene) wall that you can scrub through. It handles loads really well. The pic above is the Library of Congress photostream on Flickr.