National Geographic has created interactive maps of what would happen if all the ice melted on earth. The United States would be particularly hard hit as would sections of Euorpe and Southeast Asia. Africa and Australia would feel it the least.
The entire northeastern seaboard would disappear, along with all of Florida and the entire Gulf Coast. San Francisco's hills would become a cluster of islands and the Central Valley an enormous bay (as it likely was in the distant past). The Gulf of California would extend northward past the latitude of the now-ennundated San Diego.
National Geographic reports:
The maps here show the world as it is now ,with only one difference: All the ice on land has melted and drained into the sea, raising it 216 feet and creating new shorelines for our continents and inland seas.
There are more than five million cubic miles of ice on Earth, and some scientists say it would take more than 5,000 years to melt it all. If we continue adding carbon to the atmosphere, we'll very likely create an ice-free planet, with an average temperature of perhaps 80 degrees Fahrenheit instead of the current 58.
Click on any of the maps to see the full size version.
As respected as they are, I think NG got it wrong. The article should be entitled "What will happen when all of the ice on earth melts?"