That sounds like fun! I'd check out the murals while you are there. You can get a brochure that tells you where they are and make your own little tour. There's some wicked art- check out the Women's Centre, the whole building is a beautiful painting; there's Diego Rivera one; and so much more. Some of them are in the most interesting places. There's an alley that has really nice ones. Lots about politics and others are just plain gorgeous (or both!).
Here:
http://www.precitaeyes.org/ or if you do a search you'll find more. It was one of the best things about my trips to SF. Very inspiring!
I would't bother with the Pier. We went there and it was a big tourist trap. The crocked steep street was pretty cool though. But the art! You can't see anything like it anywhere else!