Through new official partnerships with Facebook, Twitter, and NY-based startups Foursquare and Tumblr, New York aims to become America's next, top digital city. New York Mayor Michael R. Bloomberg and the city's first, chief digital officer, Rachel Sterne , presented their Road Map for the Digital City, today. Before formulating the plan, Sterne led a comprehensive 90-day review of the city's current use of web, social media and mobile technology, and surveyed thousands of public and private sector organizations, and residential users in New York...