Trivia: The World Trade Center buildings were mostly edited out, but if you look close enough in three different scenes, you can still see it - a few images were left in in tribute. 1) When Peter is sitting on the Chrysler Building eagle, you can see 2 separate rows of lights next to the Empire State Building. 2) When it cuts to Spider-Man's face looking at the city, it is in his right eye. 3) At the end, when he is swinging on the flagpole (this one is the hardest to spot).
Trivia: The script of the movie is actually quite close to the original comics' story line. The major difference is that the Green Goblin's hostage in their final fight was not M.J., but Gwen Stacy, Spidey's other serious romance, who died from the shock of the fall when (or even before) Spidey caught her. She broke her neck when Spidey stopped her in mid-air with his webbing, something Superman and other movies ignore.
Trivia: At the festival when the Green Goblin throws his grenades and the crowds react, right before they get a shot of Parker, you see Stan Lee (creator of Spider-Man). He was supposed to originally pick up the little girl that he was pushing to safety, but he's quite old now, and after several takes he said that if they wanted him to pick her up, they were going to be there all day.