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Take a look at what Google did recently with the blog no follow attribute. Everyone that spent their time finding blogs for that purpose lost those backlinks in the last update after googles announcemnt of this.
Your site may still show up on that blog, but the link is worthless for all other purposes - unless that blog has so much traffic that you get click through traffic.
I would also submit to directories, obtain quality backlinks from on topic sites, submit articles and do a few press releases.