I asked this question a while back and got some good info. Check out the PDF link provided by mdakin after the jump: http://news.ycombinator.org/item?id=51422

I asked this question a while back and got some good info. Check out the PDF link provided by mdakin after the jump: http://news.ycombinator.org/item?id=51422 http://news.ycombinator.org/item?id=51422