I don't know if you know about that, but it is possible to get a free blog post absolutely for free.
The site Merfins.com is giving a posibility to get a blog post on their site absolutely for free.
You will get a dofollow links on PR2 blog at this time.
The way how to do this:
- Register on this site
- Go to Posts>Add New
- Add your article with up to 3 links to your sites
- Wait till your article will be approved
I think that is really great way to get free backlinks to your site.