Is Computer Programming a Good Job for Retirees?

braindrainbahrain asks: "Ask Slashdot has been rife with career advice lately, so maybe I can get some too. I hit a milestone recently, the big five oh, and the realization of retirement is starting to settle in. The trouble is, I don't want to sit around, play golf, or even travel that much. I work in a technical field, but I have always enjoyed programming. Indeed, I do it as a hobby. I wonder what you readers would think about programming as a post retirement job. It seems well suited for a retiree, one could do contract work for a few months of the year, in some cases work from home even. By way of background, I have worked in hardware engineering for a very long time, and have pursued graduate study almost regularly (two Masters degrees so far). Should I begin preparing for a post-retirement career in computer science?"