Just a point of correction, Seattle Times (I realize Eli already linked to the piece about tech transplants from California in Morning News, but we just need to clear the air here): Playing bike polo isn't Capitol Hill's favorite pastime, watching guys play bike polo is Capitol Hill's favorite pastime. Please make a note of it.
In case you're interested in which neighborhood Silicon Valley transplants love the most, it's West Seattle. West Seattle's number one (and Queen Anne and Ballard round out the top three). Go ahead and have West Seattle, California people. See you on the freeway!