Marquis is currently under construction, just less than half way to being topped off. It's the tallest of the four "Biscayne Wall" buildings in Miami (Marinablue, 900 Biscayne Bay, 10 Museum Park, Marquis), and will be 679 feet tall with 64 floors when completed. Completion is expected in about a year (summer 2008).
http://www.marquismiami.com/english/
Construction Photos - May 2007....note that it has gotten taller since then!
Below, Marquis is on the right.
I'll try to get more pictures soon (this Sunday) and continue to post updates on this tower for a while until it's topped off.