I loved the one shopkeeper who had the surgical mask on. Beware the avian flu/swine flu/SARS.
Well, TYP and James Charlton can correct me on this, but I believe the reason the man had a mask on was because in Japan it is common courtesy to wear a mask if you are sick. If I am not mistaken Japan is a very health conscious country, and considering that they have a large population living together in tight spaces I don't blame them.
I know this because I've noticed in many Japanese animes, TV shows, documentaries and even American shows about Japan that sometimes characters wear masks in they are sick and need to get out. Its considered common courtesy to protect yourself and others by wearing a mask. Hell, even one King of the Hill episode had Hank trying to talk to a man who was wearing a mask.
Even if the shop keeper was wearing it in fear of the recent outbreak he was also being considerate of other people since he was selling his goods on a very, very tight and crowded space.
Again, TYP and James can correct me on this.
As for the video feature, thanks to Densha Otoko not only do I see Akibahara as the cool, nerd chic place I also see it as a romantic place :p .