Well these days almost every another webmaster knows the importance of backlinks and getting backlink via commenting on blogs, specially commenting on blogs with higher Page Ranks.
But this article has some additional information such as using RSS feed effectively to organizing the links, this was helping.
Mot of people are aware about different page rank for different page of blog. still lot of important information was provided.
My vote: 8/10

Regards:
Dr. Shoeb
Owner of Dental Forum