of course, Blog commenting is very powerful technique to increase page rank, but I thing very considerable is that comments should be do follow!
Yep, still works. A link is still a link. As long as you mix it up and don't just to blog comments, you'll be fine.
agreed.. but content is still the king of all, so you might want to improve your products and or services though..
Yep, it still works to accomplish volume and authority if you can find good places to link from. Most of the time it is just used for volume links.
Blog comment is one of the cheapest and most effective way to put yourself out there.. post a comment on popular blogger should get you tons of traffic in no time.
+1 You are more likely to get targeted traffic then, too. As for commenting for the sake of stuffing a keyword link in there...often it is likely to look less credible and also more likely to be binned by the blog owner.
All blog comments by default are NO FOLLOW in nature. So you will not get direct benefit from it. Still, it will help you in branding and getting some extra traffic.
Yes, it's still working. Not only it can increase your Pagerank but also attract visitors to your blog. Based on my exprience, this method work well when you contribute good comment and use powerful anchor text.
I think it is, but nowadays admins are quick to reject many comments if they contain a link, so you have to make sure your comment has something meaningful to add