There's a great Taiwanese restaurant in Boston's Chinatown: Taiwan Cafe (34 Oxford Street). We had clams with basil (really good), spicy anchovy (great dried fish dish), steamed vegetable dumplings (great) and tofu w/mustard greens (also great). Open until 1am--satisfy your taiwanese food craving even late! There an interesting looking Korean place across the street that I hope to report on soon.
Full disclosure: I found out about this place in the Boston Phoenix online.