[playbass06]

Very cool! This definitely makes me wish I had a better graphics card... (averaging maybe about 10 fps on a GeForce 7150M, which also, unfortunately, doesn't support such awesome features as PhysX [it seems to emulate, or perhaps replace it with some other physics engine, though] or CUDA)

I see the field worked well for you, I like what you've done! My lack of programming skills has set me back on my version, but it's still fun. A Linux/Mac compatible port would be something to look into, but it would of course have to be limited to OpenGL graphics, which plain isn't as fast as DirectX/Direct3D.
I added some GLSL shaders into mine, which makes it look better, but sets it way back speed-wise (say, from 30 to 7 fps...).

Now, is the XNA framework free, or is it licensed, similar to the $99 for an iPhone Dev license? I've also been thinking of using a better program for later projects, say, the UDK, which looks promising, if you know the scripting language.
XNA could not only allow you to port to Xbox 360, but also to Zune, it appears!