Check out clearcube.com they have a cool concept..... Imagine less than 
40 watts at a station including monitor. In the wiring closet the 
overall wattage is less than individual PC's even the compact 
ones--probably about the same as those thin clients. They say they run 
about $1200 a seat though. But he was talking like it was a p III  866 
Mhz. And that is what you get for new, clean, secure, small, and lower 
heat/electrical (I doubt they are using many mobile components). 

Remember these are rack mount PC's not solely servers. They have a little black 
box that plugs into standard cat 5 at the users station where you plug 
in the video, audio, keyboard, mouse, or USB. This can be upto 200 
meters from the cpu/main board. They claim to run windows 2000 pro, nt 
4, 98, me, and Linux--its just a standard pc.

>
>You reach a point where price vs. density starts to soar, especially if
>it's not a mass produced type item.  Your best bet is looking towards the
>embedded PC's that are about the size of a cigarette box.   I've been
>