I spent most of the day on the go, ambling around downtown (had to check out the Apple Store, of course!), driving through the Presidio, and then checking out Berkeley (first time there) and Palo Alto (I drove around the Stanford campus). I haven't been in the area since 1992, and even then was just here for a quick stop. Highways are a big deal here, but the traffic is nowhere near as overwhelming as it is in the L.A. vicinity.