I already have an Ikea standing desk. Well it's an Ikea book shelf sitting on a desk.

https://www.dropbox.com/s/3z473x9kco92c8f/standing%20desk.jp...

The key ingredient is the adjustable monitor pole so that I can sit on the odd occasion that my legs get tired.

The beauty of this setup is that it works in with the fitted desktops that my company has. I wouldn't be able to remove a section and slot in a normal adjustable desk.