Preheat oven to 450 degrees F. Brush olive oil over 2 large baking sheets and sprinkle with cornmeal; set aside.
Divide dough into 4 pieces. Stretch or roll each piece into an 8x6-inch oval. Press pieces into cornmeal on baking sheets, turning to coat both sides. Top dough evenly with cheeses, grapes, and rosemary. Bake for 12 to 15 minutes or until edges are golden and grapes start to shrivel. Rotate baking sheets halfway through baking.
To serve, top hot pizzas with arugula and sprinkle with crushed red pepper and/or sea salt.