Miami International has unveiled the first piece of their intermodal center. This will eventually bring the metro rail to MIA, after 30 years of exceeding obviousness. This first piece is the Car Rental center. It will bring all of the various car rental sites under on roof and cut shuttle bus traffic in half.
The Miami Herald has an excellent write up about the RCC. http://www.miamiherald.com/2010/07/10/1725024/new-car-rental-center-expected.html