Now you can link anonymously to other site, your site will not appear as referrer.
http://www.shon.us/?http://www.google.com/ produces an anonymous link to google.com which prevents the original site from appearing as a referrer in the logfiles of the referred page.
shon.us Full Page URL converter
If you want to convert all your external links to http://www.shon.us, you can copy this code and place it before the closing </body> tag. Don't forget to change "yoursite.com" with your domain so it won't be converted too.
Above code means convert all links except yoursite.com.
