(What are linkbacks?)

12 hits: stumbleupon.com, from 1 year ago to 37 weeks ago:
... Your page is now on StumbleUpon! For each appearance in your referral logs, one of our members has 'stumbled upon' your site after clicking "Stumble!" ...
3 hits: www.blinklist.com, from 2 years ago to 2 years ago:
... cre.ations.net - Creation: cre.ations.net http://cre.ations.net/creation/26 ...