I was wondering if anyone had a list of high PR sites that provide a backlink in exchange for adding a profile to their site. I understand some sites credit you more for adding content to their site, and that is fine. I know all the common ones like social bookmarking, Ezine, Dashboard, etc. I am looking for sites that are different.

http://www.myrealtysource.com

Many social bookmarking sites are high page ranked. Best example is Digg. Just register and post your link on the site.