HI, Recently google has enabled comments on their adsense blog. http://adsense.blogspot.com/2008/05/now-open-for-comments.html
But comment system in blogspot really sucks...I don't understand why blogger don't use something like wordpress
They have enabled moderattion. so all the comments will be approved by some one before displayed to everyone
For sure there will be a lot of commentator will post comment on this blog.. I think this is the first time that google open up a comment posting like this..
Will not have much use from the link building prospective as all comments made on blogspot blogs are nofollow
comments are nofollow, that will help cut down the spam. there will be no help from backlinks but you might get one or 2 clicks from blog readers
What seems more important to you? A dofollow comment link that gives you no traffic, or a comment, even nofollow, that can send you plenty of visitors? After all, you use link building to attract visitors to your site.