There's a short preview of the FPS games likely to be at E3 this year on CGO. They mention STALKER briefly:
S.T.A.L.K.E.R.: Shadow of Chernobyl – And how many times has
this game showed up at E3? Without getting into specifics we would say,
“A lot.” GSC GameWorld’s action title set in a nuclear wasteland has
been in development for years and we are really, really hoping that
this year is the charm. We have our fingers and toes crossed that E3
gives us a look at this game.
The game's also going to be shown at some Russian computer show called Igrograd.
I used to be interested in the game, but now am suffering from
overkill, after being bombarded with previews then suddenly having it
delayed indefinately. Some bad marketing going on there, I think - if your game is going to be delayed, don't massively hype it.