Too bad your anniversary wasn't during the summer in July; that was the month of her venue (7/7 I believe). I definitely went, and as I presume for every other show, it was absolutely wonderful.
PLEASE COME BACK TO SF SOMETIME SOON, V. WE MISS YA. I'd say there are quite a few hills around the general downtown area, and spread around the city. But if you want specific ones: here you go:
http://gosanfrancisco.about.com/od/thingstoseeanddo/tp/hillsofsf.htmIf you visit Cliff House, there's a windy hill/road around that area. Hmm.. Chinatown can be hilly, too. But trust me; there's usually a way around the hills, so if you encounter a steep one, you can catch a bus or walk a few blocks left/right to get around it. Walking in SF is definitely a great workout (I sweat bullets after walking through half of my neighborhood).
Tennis shoes are a MUST. Make sure that you've already broken into the pair you plan to bring, too. Best chance of avoiding blisters!