We've stayed there a couple of times. It's very nicely themed (and we come from the Caribbean ourselves).
You'll check in at the 'Customs House', then you'll room will be in one of 5 areas, each named after a Caribbean Island: Aruba, Barbados, Jamaica, Martinique and Trinidad (North and South). They surround a lake where you can rent boats. Each area has it's own bus stop, so you don't have to walk far to get on one.
Old Port Royale is the central area where you'll find the Food Court, shops and Main Pool. Each area also has its own individual quiet pool. The areas closer to Old Port Royale are Martinique and Trinidad North, but they are now 'Preferred' buildings and a room there will cost a little more. Besides that, the closest would be Jamaica, which is on the other side of the lake, via a footbridge. The farthest area is Trinidad South.
We loved it. Although you may find it spread out, it's very relaxed and beautifully themed.
You can find more info here:
http://www.wdwinfo.com/wdwinfo/resorts/cbr.htm
You can check out a resort map here:
http://www.wdwinfo.com/resortmaps/cbrmap.htm
There's a thread with FAQs on CBR here:
http://disboards.com/showthread.php?s=&threadid=655543
Plus, safetymom has a great CBR website with pictures:
http://www.idhal.com/CBR/walt_disney_world_pictures.htm
http://albums.photo.epson.com/j/AlbumList?u=1770063
Have fun!!