Just a quick notice: the 16th Norway Day food & culture festival is this weekend, which officially opens the season of summer food festivals in San Francisco. While not equal to the Russian, Armenian or Greek festivals for breadth of food, what they do have (open sandwiches, cheese, and of course waffles with cream and jam) is very good and cheap. You can also sample aquavit.
The best part, though, is the cooking demonstrations they have throughout the day, especially rummengrut (butter curds).