A very cool multimedia feature on the New York Times Web site, with a "before and after" look at the Big Dig, plus analysis of how the greenway will actually turn out. It's very critical of how the city is planning to make the most of the pedestrian walkways.Does anyone else get vaguely nostalgic for the old Boston sometimes? I kind of liked all those sketchy little dives under the highway near North Station, and I miss the big red pagoda thingy. Martignetti's closing seemed the death knell for the old North End earlier this year, too -- to say nothing of the stupid high end clothing boutiques popping up over there.