For those of you who sometimes have your feet in the 4 wheeled world, Scott H, one of the Salvage Night volunteers suggest that I might post this:
The Iowa DOT is sponsoring a "share the road" license plate. 125 plates have been purchased. 375 plates to sell before they are issued.
You can get more info from this website: http://www.iowabicyclecoalition.org/strplate.htm