I don't know about you guys, but I don't run with a front license plate for the same reason that most of us don't. It ugly's up your beautiful front bumper. But there I times when you know you have to fly through hostile territory and you wish you had an easy temporary way to put your plate on.
I believe this is a great solution to the problem:
I am also a member of the Corvette forum. There is a company called Top Flight Reproductions that makes a quick easy-on-and-easy-off removable license plate bracket. It contours slightly with the front bumper as well for a nice-a-look as you can get with a license plate on the front of your car. When you need a plate you just pop it on. For parking in the city, going through tolls, or areas with over enthusiatic LEO's.
For Porsche owners there is good news and bad news. The bad news is that they only make this removable plate holder for Corvettes right now. The good news is that if you have a Boxster S, Cayman, or 911 with the center air intake they believe that the bracket will also work on these Porsches.
If they see as much interest from the Porsche crowd as they do from the Vette crowd I believe they will start making this product especially for Porsches and start advertising on the Porsche forums.
Check them out. I'm ordering mine today.
http://www.topflightrepro.com/