SAN MATEO, Calif., April 15, 2011—For Prometheus Real Estate Group, the largest owner of apartments in the San Francisco Bay area, breaking the mold of traditional advertising started with a simple blog. Today, Prometheus leverages the power of Twitter, Facebook and other social media outlets across their diverse portfolio of properties. The effort allows Prometheus Real Estate employees (whom the company dubs “Prometheans”) to share relevant, helpful information like interior design tips, neighborhood news &....