Facebook revealed plans to lease an office campus now under construction in Burlingame, California, a move that would boost the social networking firm's occupied space in the San Francisco Bay Area to more than 7 million square feet. The agreement would mark one of the biggest U.S. office leases the company has signed, according to CoStar data. Christopher Hom, Facebook's head of real estate and strategy planning, spoke to the Burlingame Planning Commission this week abou