It's half complete. I have the basic battle structure in place (which may not sound much but actually was a big job, wait till you see the sexps). To be finished it needs some dialogue, the part where the GOD sats are turned on Earth, and end conditions.
If you want it give me your email and I'll send it to you. Only ask for it though if you know your way around FRED quite well. It's not in a condition where it's playable by those without mission editting skills.