Kraedin said:
Just because you can't use expertise, doesn't mean you don't still have expertise.
As long as you still have expertise, you can use whirlwind attack. For similar reasons, you can use whirlwind attack in heavy armor.
While I agree you can whirlwind in heavy armor, I don't agree that you could WW while raging. It explicitly states that you can not use feats which require thought or concentration...then lists Expertise as an example of that. In my mind, that means that any feat which has Expertise as a pre-req is off limits while raging.
So, you still
have WW while raging, but that requires too much control/thought and therefore you can't
use WW while raging.
SRD:
He can use any feat he might have except for Expertise, item creation feats, metamagic feats, and Skill Focus (if it's tied to a skill that requires patience or concentration).
Having said that, if you want to be literal it explicitly mentions Expertise, while leaving out WW attack. One could argue that if the original thought was any feat based off Expertise, then it would have been worded that way.
I suppose it really depends on how you see WW working. Is it a skillful use of your weapon to attack all of your opponents or is it a mad single swing with all your strength?
In the end, it's probably your DM's call...