I just saw this site called "Just Letters" linked from a post on 43 Things.
It's a simple page with nothing but letters of the alphabet, as if they were displayed on a fridge. Up to 50 people at once move the letters around independently, creating this anonymous, chaotic environment where it's impossible to have any real control. Pointless and juvenile, yes, but worth short look and a laugh.
In unrelated news, check out the Ambient Orb- it's a glass orb that changes colors based on data from the web. Adam Bloom has a lot more links.