I have one Pace Adjustable keyboard available. As the name suggests, the two sides of the keyboard are adjustable. Each side sits on a "bowl" of sorts that allows a certain amount of left/right/forward/backward tilt and limited shift.
These use white Alps mechanical keyswitches. It's been a while since I've looked, but I think they were real Alps. (Not sure where my key puller is right now.)
I'm asking $40 plus shipping. PM me your zip code for a shipping estimate.
UPDATE 01/17/2011: Both keyboards have been sold.