Tobey Maguire’s good-boy image gets scrubbed up even more with today’s news that the actor, most famous for his portrayal of wide-eyed Peter Parker in the Spiderman franchise, is the face of Prada’s fall ’11 men’s campaign, shot by David Sims. He wears a three-button jacket over a mock argyle-print turtleneck, representing a new men’s silhouette for Prada and a grown-up new look for Maguire, who stars as the upstanding, straight-shooting narrator Nick Carraway in the remake of F. Scott Fitzgerald’s The Great Gatsby next year…