When I post my articles/blog entries on social bookmarking sites like del.icio.us, reddit.com, StumbleUpon, Digg.com, etc. do those count as backlinks back to my site that improve SEO? I know I get some direct traffic through those, but my main intention is to increase backlinks for SEO and I wonder how much affect I'm having. I've been using all of the above sites, plus a number of others that I simultaneously submit using Onlywire.
Thanks for your help, wise ones!