Headlined. Hopefully we'll get some more votes in here again.
Regarding the entries:
#1 -- The brightness should be toned down a little, but I like the overall feel of this map. It says tropical, it says fruity, it says Central America, at least to me. El Salvador's color I'm not a fan of...the compass rose neither. The legend needs some work, the current "bubble" effect doesn't do it for me, but I'm sure a proper themed legend can be made. The territory text also needs quite a bit of work to make it easily legible.
#2 -- I've never been a big fan of a Midkemdil style of showcasing the territories in a continent (I.E. by colored names rather than colored territory land), so take that for what it is. This map also feels oddly dark, perhaps a lighter green would do the trick? And a little more tropical ocean instead of the cold arctic waters we have now. The text is readable, though I'm not sure its the right style for this type of map. The addition of the icons seems a little gimmicky and cluttery, and it may look more clean and sleeker without them.
#3 -- I like the general look of this map, it has a certain feel to it. But I hate isolation maps (like the current Germany map that is being revamped and the current Brazil map that is also being revamped). The color choice is pretty good, though I'd probably alter one or two, perhaps Belize. Another thing---for those unfamiliar with the area, it may be difficult for some to connect what continent is "Belize" and what continent is "Honduras," etc, since the only distinguishing correlation between the names in the legend and where they are on the map is the order of the legend. The texture is a little rough, and could be toned down I think. I'm not sure this map says Central America, I almost feel this style would be better suited for a different geographical map.
#4 -- This map feels much too dark also, similar to #2 in that respect. Lighten it up, and maybe give it a warmer theme. Division territory lines are difficult to distinguish, at least without looking closer. The legend text is a little much, but I understand the general computeresque/Google Earth theme that you have going. I'm just not sure it really works with the map. Like #2, cold arctic waters seem out of place.
Good work map makers though.
I've cast my vote.