Any prove that nofollow backlink is good for SERP?

Any idea of any page on Google Webmaster Tools and/or Site Explorer help topics where one can read the details?

 

No follow link are included in google sitemap. Google knows which site points to yours. Though it doesn't have that much weight than a link without nofollow but yes it will still help in SERP if you get them from related content website.

I added one of my website inner page link in various related blogs and community (basically blogs) by posting good comments which already had some good PR and to some new blog postings which I though will get good PR in few months as their website main page PR was already good (why I did this was because link at top of the page is give more weight than one this is at the below portion, so by posting in latest blogs you get your link at the top).......
and now i'm getting some (not good) traffic for that inner page with the keyword that I used.........

It definetly helps in SERP