Greg Linden's take on the same: http://glinden.blogspot.com/2010/02/personalization-and-differential.html http://glinden.blogspot.com/2010/02/personalization-an

Greg Linden's take on the same: http://glinden.blogspot.com/2010/02/personalization-and-differential.html http://glinden.blogspot.com/2010/02/personalization-and-diff...