Check out Retrievr - it allows you to search the Flickr image archive by drawing a sketch (or uploading another picture) instead of by tags. A kind of visual tagging/search idea. It’s surprisingly nice, and nicely surprising - as it is doing image matching in terms of hues, patterns, tones, etc. it doesn’t see images as things (e.g. a face is a bunch of blotches, not a face) so it makes some interesting associations. I, of course, uploaded a picture of myself and ended up with a picture of an apple in return. Nice. That’s what baldness does for you. It’s built by some clever folk at System One.
(Gosh, Flickr started a trend with this whole no ‘e’ before the ‘r’ business didn’t they?).