An anonymous reader writes: The one billionth edit in Wikimedia projects took place today, a few hours ago, at a rate of about 10 edits per second. The Wikimedia Foundation is the non-profit organization that operates Wikipedia, the free encyclopedia. According to comScore Media Metrix, Wikipedia and the other projects operated by the Wikimedia Foundation receive more than 364 million unique visitors per month, making them the 5th most popular web property worldwide (January 2010). Available in more than 270 languages, Wikipedia contains more than 15 million articles contributed by a global volunteer community of more than 100,000 people. Today, it's a great day for the free knowledge community.