As you know wordpress is a most popular CMS for blogging and other use.

After release non stable version, now wordpress.org release version 3.0.

As wordpress.org said, this have some Highlights Features:

• WordPress and WordPress MU have merged, allowing the management of multiple sites (called Multisite) from one WordPress installation.
• New default theme “Twenty Ten” takes full advantage of the current features of WordPress.
• New custom menu management feature, allows creation of custom menus combining posts, pages, categories, tags, and links for use in theme menus or widgets.
• Custom header and background APIs.
• Contextual help text accessed under the Help tab of every screen in the WordPress administration.
• Ability to set the admin username and password during installation.
• Bulk updating of themes with an automatic maintenance mode during the process.
• Support for shortlinks.
• Improved Custom post types and custom taxonomies including hierarchical (category-style) support. (Try the Custom Post Type UI or GD Custom Posts And Taxonomies Tools plugins to see the possibilities.)
• A lighter admin color scheme to increase accessibility and put the focus more squarely on your content.

Other features or changes can be found at: http://codex.wordpress.org/Version_3.0

Click here to download Latest Version of WordPress.

You can upgrade your wordpress directly form your dashboard