In some states, you can register old plates from the actual year of your car, and then legally drive around with vintage plates (1964 in my case) for a very cool retro look.
Find a guy at a swap meet that sells old license plates and ask him if your state allows this. He might charge you $50 for a pair of vintage plates.
Next, you place a small metal tag behind the plate which reads ANTIQUE CAR and sticks up about 1" outside the right corner of the plate (but doesn't cover or obscure the old plate). Annual registration is then updated with a window sticker. It's way cool......