Someone on another board I frequent posted this saying she makes it regularly (making 2 gallons at a time!) and adds 1 cup of sugar for the 2 gallons and her kids eat it just like that, nothing else added. Anyway, I'm hoping to try it this weekend. I go through a lot of yogurt!
http://biology.clc.uc.edu/fankhauser/chees.../YOGURT2000.htm