Blog commenting has long since been a highly used method for building backlinks to your website. Actually, it has been used and abused in the past so much that most blogs and search engines have completely discounted the value of comment links in terms of Search Engine Optimization (SEO) value. Many blogs do not link out. Most have the nofollow attribute applied to comments and a great number of bloggers have turned off commenting all together.

Still, however, commenting on blogs...