Brad Baker, the man behind the curtain at the joomla.org forums made his first dev blog post a few days ago. He talked about some of the traffic that joomla.org gets. What was most interesting is that joomla.org just broke an Alexa rank of 500. That means it is now one of the 500 most visited site on the web.
He also noted that the forums are one of the 30th biggest on the web.