Sawaddee (6968 Bay Dr, just south of 71st st.), is a great value, and will give the other Thai places a run for their money. I haven't tried the sushi, but having spent about six months in Thailand over the past two years, I can say they are fairly authentic. The $6.95 lunch special can't be beat!
Dinner selection is a little better, and the portions are bigger and easier to share. The most common way the Thais eat is what we call family style- everyone gets white rice and the larger dishes get passed around so everyone can taste everything.
Has anyone tried the sushi?