It is a well know fact that by start OR editing a Wiki, you will be able to link to your site as the “source”, thus gaining important backlinks to your site.
Here are some free wiki creation sites, where you can start your own wiki
Here are some free wiki creation sites, where you can start your own wiki
http://wikia.com/wiki/Wikia
http://wikispaces.com/
http:// wikidot.com/
http:// wetpaint.com/
http:// aboutus.org/
http:// wikihost.org/
http:// editthis.info/wiki/Main_Page
http:// bluwiki.com/go/Main_P
