I really wish we had half the community community you guys have, here in Aberdeen, Scotland. You could throw a rock and hit a tech guy in SF. Here, the only groups of any prominence are MS .Net groups.
I've been struggling to find or build such a network here. I'm an open source, Linux, Python type of guy and feel I don't fit in the myopic tech culture here. I'd emigrate to SF in a heartbeat.
Good luck networking, I reckon you'll do alright. If you ever visit Scotland, hit me up!