Jan 23
One recent suggestion as part of our link building for our corporate sites was to use Wikipedia - obviously this would seem a good thing to increase inbound links etc as well as helping to boost rank in search engines, but it turns out that from yesterday Wikipedia has now added the nofollow attribute to any outbound links from the site - just so you know!
Read more here
January 23rd, 2007 at 8:07 am
Even before that, doing so would be a violation of the "Conflict of Interest" and "External Links" policies of Wikipedia.