Yumi Yogurt --on El Camino right on the border of San Mateo and Belmont. They usually have four yogurt flavors and then a bunch of "flavor burst" flavors which are basically vanilla yogurt with a syrup infusion (I say stick w/ the yogurt).
thanks for the feedback, I have been to YUMI yogurt in Belmont, they also have a store in Millbrae. I was told there are two others in san mateo? still seaching...let me know if you come across any...thanks,