Hello ArmA 2 fans!
It took some time, but now the first release of ' my' head-tracker is ready for testing: FaceTrackNoIR. It is a program that runs on Windows XP, Vista and 7 and uses the faceAPI from SeeingMachines. The major advantage over other head-trackers is, that you only need a simple web-cam and NO hats with LED's (or anything like that). All it needs is your face and some proper lighting...
The first release is ready for downloading at: http://sourceforge.net/projects/facetracknoir/files/
It is made compatible with ArmA 2 (using Free-track protocol) and FlightGear. After installation (which requires .NET Framework 3.5 SP1) the head-tracker should work. It does require the patch, which enables Free-track support ... You must also enable Free-track in the ArmA settings!
Of course, I am very curious to receive your feedback: it's the only way to improve software!