Nice!
Here's one I done a couple months back to get planetary grass coverage just using shaders... I'm no good with functions in T2 for now so, this is all done with PFS's and surface layers. Literaly billion, upon billion of little perlin spikes make the blades of grass, which are stretchable for different lengthed grass types.
The full walkthrough for the .tgd file can be read here...
http://stonefingeriiii.googlepages.com/t2grasstutorial although, the method I use now has been somewhat simplified from this write up, with generaly the same effect, I'll post the new method as a .tgd here too but, without a tutorial. It's basicaly the same with some nodes stripped that weren't essential or could be streamlined a bit.
It's
very quick to render 'grass' this way.