As long as it's on the radar that's good enough for me, thanks for responding!
To clarify - valve supplies the current headtracking, and we're not sure if they'll continue support when dx9 ovr support goes poof. Remember - hl2 can run with either dx9 or ogl.
BUT long before valve revealed their own headtracking solution, we had our own, in the first release. So we might need to go back to that solution when we move to ogl. Lots of wuestions atm.