Locals are surprised when I tell them that One Rincon Hill, the 641-foot building jutting up like Barad-Dur over the Bay Bridge, is a residential building, not an office tower. "Who's going to live there?" Rincon Hill is walking distance from both SoMa and the Financial District, so it would seem to be an ideal vertical dormitory for San Francisco's tech startups. Frank Ng, an engineer at HP's Snapfish photo-sharing site, is one of the first to move into the still-unfinished building. He'll have a one-block commute, but realtors expect most of his neighbors will be distance drivers. San Francisco hipster startups don't pay One Rincon Hill mortgages. Googloids, Yahooans and Oraclers are the target market. That's one way to sell living above a freeway onramp as an amenity. (Photo by Curbed SF)