We have these at work:
http://www.biomorphdesk.com/p-6-personal-desk.aspx
http://www.biomorphdesk.com/images/product/large/personal-1.jpg

They come in motorized and crank adjust. They also have a bunch of accessories that I don't ever use. Shelves and such.

Mine currently has a 4 head setup of 2208WFP monitors in a portrait-landscape-portrait-landscape setup.

I have a Galant at home with four pieces to make a rather large corner shape desk.

I enjoy both.