Awesome, always nice to hear about new updates.
Also, just a thought. If you're still planning on keeping the Tauren Marines as the 'tanking unit' of the colonists, I was just thinking of a few things.
1. Make them more expensive, but buff them up a bit more. That way, people would be encouraged to mix them with the other units. (And there wouldn't be giant armies of them that might hurt the whole SC feel.)
2. Also, maybe give them an ability like their WoW racial, War Stomp? An AoE stun with a long cooldown? It would set them apart from normal Marines better, and allow for some more hit and run tactics with them.
3. I remember you mentioned that one of the toss tribes was supposed to have golden Void Rays. Did you ever get around to doing that? Because if not, I could try to alter the textures a bit for it...