The Essential Silicon Valley?
kineticac: plan the trip around big events, such as Google I/O.  I'm not entirely sure you'll be able to just come here and meet people on the streets and get the most out of it.  I feel the advantage is being able to meet with people casually because you're all local, without needing to go through the formalities of a serious meeting that you need to plan for.Take some time to visit San Francisco and the coast for some nice views and other fun things as well =)