From the very brief article:
# Emissions considerably influence the world of the Zone.
# Sleep function added into the game.
# New player interface.
# Possibility to continue the game after completion in a freeplay mode.
# The game is developed on X-Ray engine v.1.6
Release late 2009.
Somewhere, deep inside the S.T.A.L.K.E.R. IP, there's a kick ass game waiting to be developed, I hope this may be it.