Found these awesome stools from Mixko, they are available as custom pieces (colour and text) - we were wondering if you could get 2 person versions as SHIFT keys or even a nice long spacebar. I am not sure how comfy they are - but they are certainly pretty cool.
Maybe the next step is a nice back-lit version of a silver or white Apple key...
Anyhow, for info on the real deal check out the Mixko site under furniture or shows like 100% Design covered on Ciba XYMARA.
[Images of the FUNKEY stools by Mixko from their site and Ciba]