i dont know whether i will get the answer to this or not cause it has many replies now what i want to ask is that if i already have a few nofollow links on different blogs will that create problem to my ranking with google.
you can always choose to comment on some good high PR blogs which will get you backlinks. For example you can comment on chethstudios blog which will fetch you a backlink
What they say about nofollow is correct. But you aren't just trying to build links for SEO purposes, are you? If your link is in your signature on RELEVANT forums, and you are making posts on quality, RELEVANT blog posts that get decent traffic, then you're going to be getting some organic traffic from that. Making posts on blogs and forums isn't ONLY about getting backlinks. You can also get some traffic directly from them, too.
if you view source, look for rel="nofollow" withing the comment section of the blog. If you are seeing the rel="nofollow" tag show up on the urls of the commentors, then the comments are nofollow, which means search engines will NOT follow them. There is no "dofollow" tag.
heheh no such thing as "do follow" its either you use "no follow" or you just leave it alone. If im correct using "no follow" only Stops the flow of PR to the link but the spiders still follow the link and it does count but wont give you the PR Juice. thx malcolm
Blog Commenting is very effective for me i love to do blog commenting Relevant to my site because They are giving me back links and also lot of traffic too ... So it is a good idea