Wow if this is what XNA can do then im well impressed, take a look at this screeny:
In the distant future, our planet has been conquered by aliens. What's left of human race is called Rebellion and we are fighting for what was once ours.
Rebellion is 3D shooter where you fight against enemy units inside aircraft, gunboats, rocket turrets...
I started this project at the beginning of 2008 and I plan to release demo at the end of 2008.