I believe it's called Ice Station Cool now. It's on the right as you are coming into Future World (not far from the fountain). It has grown since it was there originally. They now have machines that dispense the different flavors. They are on "islands" and there are little cups at each dispenser.
They also sell Coke souveniers and full size drinks at a counter. We stopped in on our last trip to Epcot (just two weeks ago) and it was noisy, busy, and the floor was terribly sticky!! Of course it was a steamy hot day and lots of people were looking for refreshment!