Warning: Spoilers
Pics of Tobey Maguire, director Sam Raimi and other stars of the upcoming Spider-Man 3film can be found at numerous places online (see below). The film has begun shooting in New York and sharp-eyed fans have been waiting with cameras ready. (Note: some pics can provide spoilerish info about the film, so proceed with caution).
Some camera phones pics can be found here, while a report about Maguire in his trailer can be found at Gawker.
More photos can be found here, here, here and here. High quality shots like the one below can be found here.
Some curious observations about filming: one fan spotted kids in Spider-Man costumes, one hanging from a rope trying to do a flip. There also was a report of a dog in a Spidey outfit. Also, models were parading before Peter Parker on a runway. Another shot involved a building (perhaps the Daily Bugle?) covered with debris from an explosion or from something coming down through the roof.