WordPress Guru & Automattic founder Matt Mullenweg gave a speech at the recent GigaOm’s Structure 09 conference in San Francisco, where he spoke on cloud computing and wordpress.com’s server infrastructure. The speech was reported on by Rich Miller at datacenterknowledge.com. According to the report, Mullenweg said, “The biggest mistake we made with the WordPress.com infrastructure was actually buying servers… (buying servers was ) not a utility. Now we lease them all on a month-to-month basis.” According to the presentation, WordPress.com runs “about 5 million sites serving more than 1 billion page views a month. Automattic uses two data center providers, the dedicated hosting specialists ServerBeach (PEER 1) and Layered Technologies.”