Ok, it looks cool from the screen shots, but I do have 1 problem...
TA Tile Sets. Why are you using them? I dont have anything against people porting maps, but using the old tilesets is... not right.
I dont want to make it sound like im doing your map down cause it does look good, just i cant help thinging it would look better wihout the tiles.
If you could remake it with your own custom landscape, not the tiles, then it would rule far more!
(BTW, you can use the textures from the tile set fine, thats cool and not somthing i have a prob with. Its when you actully use it as an actully tile set leaving you with un-natula squar islands and things...)
Sorry that this has been so negative, but its somthing i thought i had to say!
I think it looks good now and its definitely playable. But you should smooth the heightmap a bit. Parts of the landscape look kinda boxy, but this could be easily fixed.