There is no doubt about it. WordPress is the most popular content management system (CMS) in use on the Internet today. 1 in 5 of all new websites in the world are powered by WordPress.
We use WordPress on the majority of new websites for our clients. Its easy to use, web standards compliant, has thousands of useful plugins that extend its functionality, is SEO friendly and is regularly updated with new features.
Yesterday version 3.3 was realeased. New features include a drag and drop media uploader and improvements to the dashboard design with flyout menus providing single click access to any screen. For the full list of changes visit the offical WordPress website.