If someone has mentioned this idea before, I appologize.
I'm sure some of you have heard of Kiva.org - Loans that change lives well, if you 'micro loan' as little as $25 to help a persons small business in a less fortunate country, in your profile you can include a link back to your web site.
What better way could there be to get a link, than getting it by helping others improve their lives.
Here are a couple of examples of people seeking loans
Agabadji wants to buy another cow
Kiva.org - Agabadji Akhmadova
Tania wants more inventory for her store
Kiva.org - Tania Villarreal