I did it once, never again. Maybe if I get carpal tunnel I will take your advice though.
I think being proactive is important with any desk job. I work for a couple hours, hit the gym, stretch, work on my laptop standing up for a little, take breaks, etc.
Regardless of whether Yoga helps alleviate symptoms, sitting in front of a computer for hours on in is simply not healthy.
I think the good thing about this biz is the freedom, take advantage of it!