I'm originally from the SV, and am currently fairly active in the Boulder startup and tech community. I've been very impressed with the accessibility of prominent investors and successful founders in Boulder. There's the same type of geek magic here that the SV has. There's the same communal desire to help other startups succeed and grow, but with a tight-knit small-town feel.
If you haven't tried Boulder's tech community on for size, you really should. Hit http://boulder.me for more.