Anyone played the Qcon test of this? 2 words: Fucking. Awesome. Certainly makes Doom 3 worth having, and it's not even done.
The only think that sorta irks me is that.. it's fucking difficult, easy mode isn't as easy as the original easy mode, and being darker it's a bit harder to see enemies.
Absolutely awesome for the Q2 fans, and even for people who've not played Q2 before: http://www.planetquake.com/meanarena/quake2_lostmarine/