http://www.crystalinks.com/cayceatlantis.html
Some Edgar Cayce readings on Atlantis. He makes a note of the Yucatan and Atlantis's discovery, whether we'll find the civilization there, or the story of the civilization (say through the Mayan codexs), that I do not know. But he definitely implies one of them.
Ya, I should of mentioned Plato's piece earlier. I've read it a bunch of times, and took apart all the details. Anyways, from Plato's description it most likely fits the Yucatan. The Yucatan was much larger before the glaciers melted and it fits the exact size of Plato's plain perfectly, and the mountains weren't far off in the distance to the south/southwest. There was also a giant glacier lake over Texas (think Ice Age 2 here), which once the glacier wall burst, the entire thing flooded out into the gulf of mexico (there were two small channels then, much smaller than today, between florida, cuba, and yucatan peninsula) which would of raised the water levels in the vicinity 300ft for a few days, until it dispersed into the Caribbean/Atlantic where it raised the world sea levels by 7 feet. Now the Yucatan has karst topography (limestone, think of the cenotes there, or the sinkholes in Florida). Now think of a big civilization with limestone structures (like the Mayans and Egyptians) atop unstable limestone ground (full of underground rivers). Also, throw on 200-300 ft of water on top of that in terms of weight, kasplat! And it wouldn't take a long time for limestone to whither away from water erosion. And as Plato said, Atlantis was reduced to a "shoal of mud", not that it sank into the depths of the ocean. Also, a big key is Plato said it was past the "pillars of Hercules" or the straits of Gibraltar as they are known today which obviously points to the 'new world'. The Bahamas were also one big island at the time, and the Carribbean islands were much larger. I would have to consider the Yucatan to be the center of the Atlantean civilization, while the Carribbean was the larger portion of their civilization (And also central and north america one would have to assume). It indeed would of been an ideal area for a maritime civilization.
BTW, that is my own personal theory from what I have gathered over the years.