Anyone tried this?
http://facetracknoir.sourceforge.net/home/default.htm
some debate on the subject on SAS: http://www.sas1946.com/main/index.php?topic=7689.new;topicseen#new
and some more: http://forum.ivao.aero/index.php/topic,171358.0.html
i've installed it with no problem, but tracking is veeery slow, low fps (cca 20 - 22fps), can't turn my head over 3 or 9 o'clock, high processor usage by the process (15-20%)
but i'm quite sure that most of the problems can be solved with finetuning.