[specialist]

I bought a cushion bar stool off craigslist. Works great. Stand, lean, half-sit, full sit, whatever.

Before that I had drafting stool. Sometimes made my ass fall asleep, which was my reminder to move around.

Followup: Just googled "Swopper Air". $699. Bam. My bar stool cost $40.

[dsissitka]

I picked one up for less than $500 a few years ago. I wonder why its price skyrocketed. Its successor is currently priced at $559:

http://www.ergodepot.com/Muvman_p/muv.htm