There was a thread about this not too long ago -- but some of the things that were mentioned were Muir Woods, Stinson Beach and Sausalito (since you'll have a car).

In SF, check out The Metreon (movies, restaurants), and shopping in the Union Square area.

A few weeks ago, we had dinner at the Fog City Grille...locals will probably say it's a tourist spot, but the food is great -- try the truffle fries!

Have fun!