I couldn't find any threads about world at war, which is a pretty OK follow-up to COD4, so lets start one anyway.
Also, I think the DLC is all going to be free for PC:
http://timedoctor.org/2009/03/call-of-duty-world-at-war-dlc-to-be-free-on-pc/
Also, I think the DLC is all going to be free for PC:
http://timedoctor.org/2009/03/call-of-duty-world-at-war-dlc-to-be-free-on-pc/