I'm a bit too busy to find the link right now, but this reminds me of a great debate I had with another FTer about whether the Caribbean was in North America (my position) or South America (their position) when a proposal was made to split the Other North and South American airlines forum in two.
In any case, from poking around a little it looks to me like Other North and South American airlines is a fine and appropriate place for Caribbean-based airlines.
But I'm open to being convinced otherwise.