Microsoft and Ubisoft released a demo of Blazing Angels Squadrons of WWII yesterday on Xbox Live Marketplace.
The game is pretty slick, and captures the feel of aerial dogfighting. The opening tutorial is a little irritating (mainly with the "drop manifest" task), but once mission mode starts, it's much more engaging.
I'm curious to see if the full version of the game on-disc has better graphics than the downloadable demo. They're not bad, but not the caliber of the Xbox 360 shots shown in Game Informer Magazine. That's what happened with Condemned, so I suspect the shipping graphics will be better.