Chinese photo whispers
Oooh. This is a great idea.
I was idly trawling the web, and found this: Kevan's Photographic Chinese Whisper page. His crowd did it once, and here's their result page - nice, isn't it, how the plants gradually disappear as the whisper progresses?
I want to do one of those, too.
Let me know if you're interested - if enough people say "yea" I'll set things up. You don't need a website, but you do need access to a digital camera.
This looks absolutely fascinating.