Good job. I myself have full EarthSculptor support in my game too, already for a few months. (Including water, 8 detail texture support, skybox, automatic texscale calculation, etc.) ES is really a great tool, except that for large terrains you can better use something like L3DT.
Oh by the way, did you know Ernest Szoka has put EarthSculptor’s water shader on the ES forums? Its in ASM, you do need to port it to Cg, but that’s not that hard. 