Previously discussed at http://news.ycombinator.com/item?id=1277004 http://news.ycombinator.com/item?id=1277004 , with some good commentary on simulations of va

Previously discussed at http://news.ycombinator.com/item?id=1277004 http://news.ycombinator.com/item?id=1277004 , with some good commentary on simulations of various stopping rules.