This plugin will add urchinTracker() functionality to all of your external links (absolute links) and email links in your posts/pages.
v1.4.2 = added support to automatically insert the google tracking code before the body tag
v1.3.2 = added support to exclude internal domain from results via the options page
v1.2.1 = added support for email links and validates the email syntax
v1.1 = added support for external links (only http, https, ftp)
Free Download: Download this wp-plugin