Bring a large pot of water to a boil. Using a sharp knife, cut each ear of corn into 3 or 4 pieces, each about 1 1/2 inches long. Add corn to boiling water, and cook just until corn is tender, 3 to 4 minutes; this should not take much longer than the time required for the water to return to a boil.
Drain corn. Toss with melted butter, and season with salt and pepper. Serve with lime wedges to squeeze directly onto corn.