Re:One of the few products that works as advertise (Score 1)

I believe that there is Linux support for the TrackIR and SmartNav products. Though I think they are focusing more on the assistive/adaptive technology aspect and trying to get it integrated with the Linux desktop. As the gaming applications are still somewhat limited.

I did a google for trackir + linux and got their site, I believe it is trackir.superlucidity.net

If you are really serious about getting support for this bad boy under Linux I would contact them.