In this article I will give the code for Joomla 1.6, rather explaining the details of the upgrade. If interested in knowing the details see my previous article.
We will take the AddThis version 1.1.1 which is compatible with Joomla! 1.5 native and convert it to Joomla 1.6 native. You can download this from http://www.addthis.com/tools/joomla, This plugin is also mentioned at JED http://extensions.joomla.org/extensions/social-web/social-bookmarking/9111?qh=YToxOntpOjA7czo3OiJhZGR0aGlzIjt9
Thanks to AddThis team for such a great plugin.
Download the upgraded file zip file