The folks at Mindjet (makers of mind mapping application MindManager Mac 6) feel my pain. The Mindjet blog, celebrating the company's first appearance at the Expo, is featuring a mindmap San Francisco-style covered with suggested dining, tourist activities and local intelligence. You can send in your suggestions as well and possibly win a copy of the MindManager application.
Here's my dining suggestion: if the weather holds up, take the F streetcar down to the Ferry Terminal Market for lunch. Back in August (at WWDC) it was the best place to take in the view and some excellent sushi; might be too chilly in January to sit outside, but you never know.