Considering that Apple was on the receiving end of a trademark fight with the Beatles for decades, it's not clear why it's prudent or necessary for the company to pick a fight with a city known as "the Big Apple" since before the invention of the vacuum tube. I guess once you stake out your orchard, you have to make sure those darn kids don't steal the fruit. More on this story from BloggingStocks and the NYT.
Update: Nilay Patel at Engadget (who is a lawyer) describes the opposition filing as a normal part of the trademark process. Still seems kind of petty.