I'm almost done with my internship here in San Francisco, and it's been a great experience. I've heard people like Steve Souders and Brendan Eich speak and I spent a night hacking at the Computer History Museum (thanks to Mozilla) amongst other things. I found meetup.com, sftechtalks.com and the several tech related meetup groups to be a great resource as well. Attend them for the talks and as a bonus, get free food and drinks (mostly pizza just like in college) and goodies as well! Live life like a true (cheap) grad student!