Link to old posts: http://chowhound.chow.com/topics/722235
Multiple locations of Sprouts will roast this weekend, this link for Dates & Times: http://sprouts.com/hatch-chiles
Northgate market in Escondido roasts this weekend also: http://www.northgatemarkets.com/index...
These are only the events I have heard of, there may be others. Once a year chance to get them, and this is towards the end of the season.