The desk legs were motorized, and you could raise or lower it to the optimal height!
The desk legs didn't have to be fixed. If you were short, or sat on a yoga ball instead of a chair, just bring it down a notch. If you were tall, or preferred to stand up while working, bring it up a notch.
At the time, I was using a stand-up desk myself. I had back problems, and standing up while typing was the best thing ever... but on occasion I wanted to sit down, rest my feet, maybe lean back in a chair for a while. I thought, this desk would be perfect! But there was one problem:
Ikea discontinued the desk!
Not the desk model, mind you. Ikea still sells the Galant Desk, and it's pretty slick... I have one myself. They simply stopped selling the optional motorized legs that allowed the desk to move up and down.
I contacted them, to ask if it would be possible to start selling the desk legs again... they gave me a standard line about margins, distributors, producers, etc. I didn't care, I just wanted my motorized desk! Hell, even if they sold the legs at $250 each, it would still be cheaper than most stand-up desks that you can buy.
If you think a motorized desk is a great idea, then please sign my petition! We have almost 200 signatures thus far... Even if we can't get Ikea to start selling it, we might be able to drum up enough interest so somebody else will.
UPDATE: It appears that somebody named GeekDesk on Bonanzle.com is selling something similar... They have pretty positive feedback on EBay, so they are probably worth a shot. They should be launching an official site for their adjustable height desk soon. Hooray for the internet!
UPDATE 2: In January 2010 I bought one of those Geek Desks, and I like it very much... it's a bit bigger than the Ikea desk here, but it's at about the same price-point. If you want a decent motorized stand up desk, they might be what you need. I'll be posting a more complete review with video when I have time.