I did a search but couldnt find any posts on this. I was wondering if Vendetta Online supports the TrackIR head tracking hardware.

http://www.naturalpoint.com/trackir/products/trackir5/

I dont think they've built in specific support for this thing, but if it can emulate a mouse or joystick it should work.

VO's got excellent joystick support for multiple devices and lots of axes and buttons.