http://www.27bslash6.com/goodideasforwebsites.html (http://www.27bslash6.com/goodideasforwebsites.html) :P
AmIHallucinating.com
A site where people type, hit submit, and the webpage confirms they actually wrote what they are sure they typed.
If they don't see the same text back, or the keyboard turns into a python, they're hallucinating :D