In the past three months, I've met a CEO of a 300 person gaming company, M&A execs from Fortune 500's, Engineer[0] from Google Finance, the head of the Singularity Institute, artists that make 2 story flaming sculptures, an architect that works on computational architecture, a man who built a battery that charges in 10 minutes that is currently in use by Special Forces in Afghanistan, a former Yahoo VP, a VP from AT&T, the CTO of America and the man who wrote the Jobs bill... a person on the US Council of Foreign Relations, a man who helped the Arab spring flower in Egypt...
That's not to brag. I've simply been extremely deliberate about networking over the past 5 years.
In Silicon Valley, even after being here for 6 months. You probably don't realize it, but you're only 2 or 3 degrees of separation from everyone else who's really, really impressive in town.
To that density, add a culture that places an extremely high value on helping others out, and you have something amazing.