It's very close to public release, now. They're sitting at Beta v3, and all I know is that it's delivering Q4 2014, which ends very soon. The head-tracker I'm using is FaceTrackNoIR, which is open source and can spoof Elite into thinking it's TrackIR, an expensive bit of software that Elite has been set up for.The voice recognition is done through Voice Attack, which I have a trial version for but it's only US$9 to buy.
It's fun to launch from the hangar, and say "raise landing gear" instead of having to look on my keyboard for the "Insert" key, or say "Target nearest hostile", or "charge jump drive", or anything like that. Sure, it's nerdy, but that's why I love it! :D