I hope this article won't cause too much controversy: http://www.nytimes.com/2010/10/22/business/22chicken.html
It's about a couple of companies using carbon dioxide (some commenters of the article think the writer actually meant carbon monoxide... I don't know enough about the science of these things to be sure) to put chickens to sleep before being hung upside down and killed. The article has a couple of graphic descriptions on slaughtering so a fair warning there, but there's no pics. Personally I think this is a step in the right direction regarding the slaughter of animals.