The advantages of anonymizing your external links with Anonym2
Webmasters can use this tool to prevent their site from appearing in the server logs of referred pages as referrer. The operators of the referred pages cannot see where their visitors come from any more.
Using the referrer removal service is quite easy:
http://anonym2.com/?http://www.site.com/ produces an anonymous link to site.com which prevents the original site from appearing as a referrer in the logfiles of the referred page.