WordPress 2.5 has been released and includes a huge number of changes over the WordPress 2.3 series. The new version is considered to be a major step forward, lots of elements have changed in the interface for example.
Some of the major features in this release include:

faster loading
cleaner interface
integrated gallery and media management
built-in gravatar support
plugin one-click updates

While getting new versions of your plugins, you might want to also check a new interface for your administration, Dashboard Widgets.
Dashboard Widgets — the dashboard home page is now a series of widgets, including ones to show you fun stats about your posting, latest comments, people linking to you, new and popular plugins, and of course WordPress news. You can customize any of the dashboard widgets to show, for example, news from your local paper instead of WP news. Plugins can also hook in, for example the WordPress.com stats widget adds a handy double-wide stats box.
One feature that I like is Few-click plugin upgrades.
Few-click plugin upgrades — if the plugins you use are part of the plugin directory since 2.3 we’ve told you when they …