Yup, I'm excited as well about MOO3! I will without a doubt be buying this game. I have both of the original ones. I think it shows a lot of promise.
Personally, I thought the MOO1 was better than MOO2. I just like the idea of building 32000 of one ship type. I felt in MOO2 I was too restricted in space fleet size. Also, I felt MOO2 just barely crossed the line of Too-much-micromanagment. It was still a good game, I just think that MOO1 was more playable.
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"Elvis has left the building!"