It seems like just yesterday that the Brooklyn Bridge was being blown up by Hollywood. How time flies. I Am Legend, the movie for which this post-apocalyptic craziness occurred, is opening today (get your promotional survivor kit ready!). In the 100 minutes of watching it, you'll meet three main characters: Manhattan, Sam the dog, and Will Smith ("Robert Neville"). The combination is apparently a winning one, as the reviews have been frighteningly positive...it will scare......