This is a very long read, but just an outstanding article on debunking the great myths of our day. And very funny in spots too.
The author nails the real point as well... it's not that there are conspiracy theorists out there... it's that there are millions of them (as the author points out, look at the positive response Rosie got when she stated that the US Gov't brought down the WTC).
Part two is up at Eject! Eject! Eject!