Flickr Colr Pickr
One of the big things at SXSW this past year was people posting their photos to their Flickr photostreams. I called it FlickrBlogging. One minute you were sitting in the hallway with 15 other people, 10 minutes later a picture of it was on Flickr (guilty as charged on all counts, officer).
Anyway, here is an interesting tool that uses Flickr, although I am not sure what use it serves other than “cool”.
Pick a color from the color wheel, and it will return 12 images from Flickr with that color as the dominate color in the picture.