This is an update on this post. The evolutionary biology community answered massively in the last Nature issue. There are total of 5 brief communications stating that Nowak et al. are wrong, who still stand by their work and claim that the concept of inclusive fitness neither useful not necessary to explain appearance of social behavior.
Links:
1. http://whyevolutionistrue.wordpress.com/2011/03/24/big-dust-up-about-kin-selection/
2. http://blogs.discovermagazine.com/loom/2011/03/23/inclusive-fitness-return-to-the-wrestling-ring/
Mathematical Biology 