SEOprofiler shows the backlinks only for the creativecommons.org subdomain, excluding support.creativecommons.org, wiki.creativecommons.org, search.creativecommons.org, de.creativecommons.org, etc. For this reason, the backlink number appears to be lower.
http://siteexplorer.search.yahoo.com/search?p=http%3A%2F%2Fc... 293m
http://www.seoprofiler.com/analyze/creativecommons.org 19m