http://wordpress.org/about/ is outdated in a variety of ways, some obvious such as the language "2008 looks on track to do three major releases again. It will be a very exciting year." 2008 was exciting, after all but... WP deserves a refreshed About page :)
There is one bit of information in which I'm particularly interested. From the opening lines: "It has grown to be the largest self-hosted blogging tool in the world, used on millions of sites and seen by tens of millions of people every day." WordPress.com now hosts 7.5 million blogs, wrote Matt in September 09 and while that's an easier figure to add up, we can do better than describing the number of .org installations as "millions of sites." Is it 5 million? 10? 20?
Who has a better figure or means to it? I see there have been over 6.6 million downloads but of course, that's not quite the number of WP sites.