Um, I'll talk to the guys and see if I can post some pics of the new terrain textures I've been painting.
This is a shot of all the new grass overlays, well 9 of 10 and one of the new water textures. Also, you can see 3 of the new cement textures, though it's hard to see the detail in this image. These will be in the next release. Unfortunately, we don't have a release date and I'm not one for making promises I can't keep, so quoth 3D realms "when it's done."
I will tell you this much, however. Currently, I have around 50 or 60 new overlays and about 10 new water tiles. The new overlays, so far, consist of sand, mud, grass, plains, tundra and snow. The water tiles will also have frozen oceans.