We've had success with it. See them in our backlinks. And have seen increases in the SERPs for pages we link to. We post to no follow and do follow blogs. Though google may not pass value from no follow links, it appears that some of the smaller search engines do. Plus it looks more natural to google if you post on both. Google expects to see inbound no follows to your site. As a blog owner myself, keep your posts relevant and meaningful. Sorting through spam really sucks. Find blogs with relevant content to your site. Don't post things like: That was a great article. Thanks. Would suggest a broad approach of article syndication, blogs, forums and directories to build inbound links. Hope this helps.
if we want to get to increase your PR then post to blogs with dofollow. for traffic and marketing nofollow. But I agree with ChiefLee above, if you want it to look natural to google you have to post to both dofollow and nofollow
if you post to relevant blogs you can get real good results... Blog commenting is the easiest way to get backlinks.. You need to use an automated software though.. If you do it manually it will take ages. You can check my solution on my signature.
if you can aquire blog posts these should help with ranking only after you have a foundation of links already
Wow there is so much misinformation on this thread, it's mind boggling where these people come up with these "theories." Yes blog commenting does help, no it does not matter if it's do, or nofollow, pr0 or pr6 - related to your niche or not - it doesn't matter. I have plenty of sites on the first page of google for it's keyword with only blog commenting backlinks. You just need to be steady and consistent and as natural looking as possible (don't hire a company to spam your link 1000 times daily). I can attest to this a thousand times over. Article directory backlinks are next to worthless, but you can get massive direct referral traffic if done right. I would take a pr0 blog backlink over an ezinearticles backlink any day. If your site is not ranking well you either need to do some on-page SEO, or perhaps you got sandboxed, or it could be a multitude of other reasons unrelated to your backlinks, blog backlinks or not.
I have seen some sites whose backlinks are most from blog commenting, well these sites do not have high PRS, but they do rank well.
Good information here. I would say that in the long run it may just be better to seek out relevant forums and leave your links there.
I would never waste my time with blog comments. It's so time consuming and just looks spammy to google. Why not just email webmasters with high PR sites and ask for a link to yours? If your website is useful to his visitors, he will post a link to your site, a DO FOLLOW, high quality, one way, high PR link. That is what you should be aiming for. NOT thousands of crappy PR1 or PR2 blog comment links. Everyone uses the same blog commenting software - it just looks like spam. REALLY annoys me hehe. If you can't get high PR backlinks from your content alone, then you don't deserve the backlinks, and google might give you some PR, but you will never do well in the serps without consistantly good content. You all know it's true.
No doubt that blog commenting takes time. But, it can help us to increase our PR especially when we do commenting on blogs with Dofollow PRs. Like you said, even though the inner pages has PR 0, it is still never mind to do commenting on the blogs because the home page which has higher PR already get the attention from Google to rank it well in the SERPs. This will benefit you in getting some decent traffic. In future, the inner pages that you leave comment on it might have PR value also due to the quality content the quality of the site/pages. No harm to leave a comment in site/pages with high PR values you have nothing to loose.
And some blogs are moderated by the blog owners to prevent from spamming. In most cases, it's effective but somehow it takes time for you to get a do-follow links through commenting.
So far it has worked for me. One of my blogs got a PR 1 in less than 3 months because of it. I experimented on blog commenting to check if my new blog's PR will increase through that method. I've continued that method and I'm waiting for the next update how my blog's PR would increase.
I think blog commenting can work but make sure you comment on topic blogs "where part of your anchor text is already on the page text". This has worked for me in the past. I've also tried high pr blog commmenting on off topic sites and I tripped a Google penalty!
Yes, I think blog commenting can be very effective for backlinks. In my google webmaster tools, I see lots of links from where I commented on blogs. But, one of the problems with blog commenting, once the link has been posted, its almost impossible to change it. So if you move the site to a new domain name, all of those links have been lost. A 301 redirect might work to get the links redirected, but you want to think long term. Then there is the factor of how long the blog will stay online. If you post on a lot of self hosted wordpress blogs, a majority of sites close within their first year. So a lot of your links might disappear within a few months of being posted. When you thinking about posting comments on blogs, pick blogs that are popular and that have been online for at least 1 year.
Blog commenting does work! Anybody who says different has done it wrong or on nofollow pages! I do blog commenting, have techniques to find PR pages (up to PR8) and post my comments! P.S. Article publishing also does work! I tested with many sites, different strategies, and 1 site, I only posted articles qith 2 links. Got PR2 in about 3 months! I don't see how this is 'a waste of time!!'