Thing #5, Flickr

My previous impression of Flickr was that it was responsible for e-mails from friends with "765 photos from Henry's first day of kindergarten" and "1,250 photos from our trip to the Grand Canyon" and "75 million photos of my face from a distance of five inches," etc. Now, I see that it can also be a source of images that I'm trying to find - from just about anywhere.