Herzog & De Meuron
This is news to me but before Art Basel began Herzog & de Meuron unveiled the plans for the Miami Art Museum which was reviewed by the Times.
For more have a look at the review: NYT: Matching Architecture to the Art in a New Miami Museum
Also, their amazing new parking garage is under construction at the western end of Lincoln Road in Miami Beach. The New York times has the scoop: Square Feet - A Miami Beach Parking Lot, Designed by Herzog and de Meuron.