...On a side note, the PS3 is going to be sweet, not really that much better hardware wise as far as I know, but the games that are coming out with it on launch should take your breath away. Assassins Creed being my main interest in purchasing at the moment. I wouldn't mind spending a few hours hanging out with that game's producer either.
It's funny to read these pre-release posts now that the PS3 is out and it sits unwanted, unloved, and unplayed on my entertainment shelf while I went out and bought a second 360 just so I could have one at my girlfriend's house.
And of course the PS3 release games were so bad they made the Wii a smash hit.

Any way, thanks for the great XNA 3D engine tutorial. I know nothing about 3D programming so it's been a real learning experiance.