Jill already blogged this, but I will repeat the action and spread the love.
Hanne-Lovise Skartveit has made a lovely little animation/film/sound hypertext doumentary about the F train in New York. When I was last here we were shopping for the gadgets she needed to make it, and this time around the thing has been published. She has been recording sound on the train, interviewing people who use it and live in the different areas, and made it into a little game-like experience where you can choose which passengers waiting at the station you want to go with you on the train. Tip: Don't bring too many, you can't hear all their stories before you're at the next stop!