This is amazing, and I'm going to rep you for it! My first impulse when viewing the first of your maps was "well, it looks a little flat" but the zoomed in versions made me shut my mouth quick--they are amazingly realistic. I love the color-exclusion effect on that last one, especially. I'll have to remember that for my future maps!
The mountains look like some really clever use of the layer-style effects--I wish I could have watched over your shoulder while you made them! Do you have any special brushes you use for them (that you'd be willing to share?) Also, it looks like you have a really detailed and impressive height map going (especially noticeable in the ocean areas). Great craftsmanship!