A while a back I blogged about a service called Qassia , it pretty similar to a wikipedia where users can add information about various things but the difference is Qassia reward their contributors with back links to their blog. It was in beta stage then so users were not allowed to search but now they have allowed the search functionality. So every time a user searches for something and comes up with your result they will see a link back to your blog in it. Below picture will give you a good idea.

see the prominent link back to my blog , well that could be your blog. Membership is through invitation and you can sign up through here.

Other than the search going live it looks like the people at Qassian are doing a massive campaign to build up back links to their blog , so after signing up you can add a sticker of Qassia in your blog and you will earn credits every time Qassia crawler comes to your website and found your sticker there. Well thats one more reason to sign up for Qassia.Just click here and you are ready to go.