Fin's, a new Japanese place in the same building as UBurger (636 Beacon) in Kenmore Square was handing out free boxes of shrimp tempura maki (5 slices) at lunchtime today. If you're in the area, and like free food, you might want to stop by. I don't know how long they will be out there, since the weather isn't good - I saw the wind blowing the bags off the table they had set up.
The sushi was ok (especially for the price...) - not great, but not bad either. Their menu says they have another location near Cleveland Circle and own Symphony Sushi in Boston.