Has anyone used Brad Callen's seolinkvine.com? If you have, did you get any success out of it as a link building tool?
First of all, contextual backlinks are definitely beneficial...no matter where you get them.. I used a variety of blog networks including SeoLinkVine. Can't really pinpoint whether it is SEOlinkvine doing the work...but I do get lots of pingbacks from their donor blogs.