I know a guy at MIT that works for days at a time in his "cave" - he has a room with a wide wall and a desk in front of it.
He has a dual head video card going out to dual high res projection systems that display on that white wall in front of him.
Essentially he has a high res monitor that is over 12 feet wide and 10 feet high.
The resolution he runs that at is hilarious - but it rules for programming. the graphics card is designed for high end CAD stuff, but he programs.
He hardly ever spends money on anything - his apartment consists of a TV on top of an overturned cardboard box that it came in and his futon which he eats and sleeps on - and then the side room that has the cool computer equipment.
I haven't gone to this link that Wodin has yet
The coolest setup I've ever seen is in Akamai - their control station is this little room that have setup that is all monitors with switches that allow control of the feed - you can pick any TV station off of a satellite feed, or over to any number of server feeeds.
It is for watching weather and what networks are up/down and it charts out over a map what is working and what is busy and whatnot.
I used to have an image of it that was amazing - but I have long since lost it. I used to work in the room next to the thing and would lean in to look at it just because it looked so cool.
It looked super high tech, but it was essentially just a really nice big cubical that went all the way to the ceiling.
The computing power of it was very low, but it the visual action was fantastic.
Reminds me of "The Eye" in Stephen Bury's "Interface".