Wikipedia Blocked SEO URLs
Enough spammers I’ll say, because Wikipedia added nofollow to all external URLs since last Saturday. It looks like Wikipedia was targeted by some SEO guys running an SEO contest. I’m not sure if it was a fun rumor or no, but Wikipedia admins didn’t wait to make the decision and stopped all those who used the free encyclopedia for SEO purpose whatever free or paid.
http://lists.wikimedia.org/pipermail/wikien-l/2007-January/061137.html