Just recently became obsessed with these... I had them for the first time ever at one of Uni's late night ramen nights ($8 for a pretty big portion, "flaming" bonito flakes on top), and then ran into them again on the menu at Estragon (similar preparation, smaller portion, no bonito, but still really good).
A few questions... Where else have you had great shishito peppers? Where can I buy them fresh? I saw the thread from last year, and based on that I'm guessing HMart would probably be one of the best bets, but can anyone confirm recent sightings in Asian markets that are closer to downtown Boston?