I guys anybody know that if we comment on problogger.net blog, which is one popular blog on the blogsphere, is it make value of getting backlink? As far as I know that their blog is nofollow. Well I do not say about getting traffic from problogger blog commenting.
As you know problogger.net is no follow so its unlikely that you will get any benefits out of that in terms of Back Links.
All the usual suspects (Chow/Shoemoney etc) run their blog comments as nofollow, but you can get traffic from commenting on the articles early on when you get the exposure. Some provide top commentator dofollow links, but you'd have to spend so much time on there to stay at the top.