Myself and a few others are working on a S.T.A.L.K.E.R. themed RP/combat sim, its currently in the planning stages, we have made a group so we can gather supporter and people who would be interested in checking the place out.
We aim to expand to more sims later on so we can make a small continent, so you can get lost within the world.
We are developing our own combat system which will make use of carrying limited ammo, realistic damage, etc, we want people to scavenge for ammo and such rather than running around spraying off their weapons.
The group name is 'Project S.T.A.L.K.E.R.' or do a search for Potere Kawashima and add the group from his profile.
Will update this a little more later on.