Otaku Food Souvenirs

As Akihabara becomes more of a tourist attraction for Japanese looking to visit the center of nerd culture (which is currently experiencing a bit of mainstream popularity thanks to the mixed-media blitz that is Densha Otoko), the latest big thing there is o-miyage -- gifts, usually in the form of food, that are only available in a certain location and meant to be taken back home for your family and friends who didn't get to go.