If you want to add to the 3d look of this I would think the labels near the front should be a little bigger than those in the back. Just a gradual shrinking as they get farther away. I know it's pretty much a math calculation and you'd have to do it for each size label but it seems it would enhance the illusion. As it is, with all the labels being equal it's like you have a 3d map and a 2d map on top of each other. I've never tried what I'm saying either, so mind you, it might look terrible but it's a thought you might want to explore.

Oh, and this is looking way cool man.