We can reveal that Zuckerberg, whose website now has over 500 million users, has installed a state-of-the-art security system featuring CCTV with motion sensors and alarms.

Fortune - Facebook chief executive Mark Zuckerberg has moved into a new house, just seven blocks from his former home in the College Terrace neighbourhood of Palo Alto in California. With his incredible personal fortune, Zuckerberg could easily afford a dream mansion. So when the 26-year-old vacated his rented home towards the end of last year, it had been expected he would move into something more befitting of his status as the world's youngest billionaire. California, USA - We can reveal that Zuckerberg, whose website now has over 500 million users, has installed a state-of-the-art security system featuring CCTV with motion sensors and alarms. Tuesday 11th January 2011 (1 Picture)