What would it take to get a game created in Blender working on an X-Box??

a port to Windows CE? Or wouldn't it be as simple as that?

I thought the Xbox ran on a stripped of Windows 2000 kernel, not sure. Maybe you should wait till the xbox-linux project is a bit more mature (it now only runs on an xbox with a modchip). That would be a lot easier.

From what I've been able to tell, it would take

a) the hardware required to interface with blender (keyboard, and mouse)

and OpenGl support

maybe support from m$ such that blender can be put onto one of those (dern copy-protected) disks, which would mean that M$ gets a portion of the profits (... but since blender is free, somebody will loose money), and the version will not be up-to-date (as it will have had to be burned, and shipped...)

I guess it would mostly require a modchip, and opengl support