One of the coolest license plate ideas I've heard: If your bike is considered "antique", you can get a plate from the year of your bike/car/whatever and register with that. So, mine's a '75, so I can get a NOS or used '75 plate, take it in, and register the plate to the bike. Government working for you, instead of against you, for a change!
I see antique car plated cars and trucks on the road almost every weekend, so I wouldn't worry too much about it.