Well, i've been working for a while on a space engine prototype with procedural generation, NO planet or nebula you find will EVER be the same! Check it out at my dev blog
http://talismanfusion.tumblr.com/
click universe test or look for the blog post.
And dont worry, Caliber the zombie killing game is coming soon!
FrozenFire
The space engine is really neat, the controls of your ship are AWFUL :C
Mouse for rotation
Button for accell
Let go for brake
Click for whatever click does already ;)
Seems to be the best solution for these types of games :\