Updated to serve Joomla 1.5-1.6-1.7 and now 2.5 in one single iteration. The extension was also updated to use the newer Asynchronous Google Analytics tracking code from the old URCHIN.JS and GA.JS.
This Plugin was created as a better alternative to the several "module based" solutions that are out there. As far as I know this is the first and only Joomla! 1.5 Native Plugin that does this.
Google Analytics, just like this extension, is free for you to use. Visit "http://www.google.com/analytics/" to signup.