All the specs posted on the blogs say the galaxy phones are "expandable to 32GB". Does this mean you can add 16GB card to get a total of 32GB, or that you can add 32GB for a total of 48GB? The way it's been worded on all the sites I get the impression that the max SD card you can put in is 16GB but that seems silly. Can anyone confirm? I'm looking at the US versions, most likely the AT&T Captivate.