Pjman - 11:48 pm on Mar 28, 2011 (gmt 0)
Sorry should have been more clear. I use MyBlogGuest. I used the free part with good success via their message system. One forum post could usually get me in contact with about 10-15 guest blogging gigs on relevant sites.
I'm going to try joining their paid system soon, when I get time to write some real quality stuff in bulk.