First, I don't know why I'm surprised, but are you aware that there is a world's trade fair entirely dedicated to office furniture (among other things)? NeoCon 2006!
Second, are you aware they give out Gold & Silver medals for "continuous fixed seating systems" (among other things I presume)? They do. (Good thing that site requires registration... that's got to be some high quality information information about facilities management. You can use my login and password to get in if you'd like: username: "whatseriously", password: "what")
Here's a picture of the award winning continous fixed seating system!
However, let's get to the issue at hand. Chairs. According to this article that's been sitting around on my desk for no less than 3 years, the award winner for 2002 for office chairs is Knoll, with this little bad boy.