WordPress 2.5, Life Blog Upgraded.
The Dashboard
The Dashboard’s most important role is to inform quickly and get you to where you’re headed in the admin. In interviewing users, we found that most of you ignore the Dashboard entirely — its useful information being mostly hidden in an overly complex design. The new Dashboard is focused on the most relevant tasks at hand: a quick summary of what’s published and scheduled for publication, the latest comments and incoming links, blog stats, and WordPress updates and news. You can add your own RSS feeds and edit the way information is presented so that the new Dashboard conforms to the way you use WordPress.
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.
Navigation
The WordPress navigation has confounded even sophisticated users. With the new design, we’ve cut the number of navigation options in half, separating the primary functions (writing, managing posts and pages, editing the blog’s design, and managing comments) from secondary functions. This presents information at a more comfortable pace, revealing only the information that’s necessary. Everything you need is still there — just better organized. (Especially for people new to WP.)
Write
By far, the most frequently accessed part of WordPress is the Write screen. It gets the job done, but its myriad options can be overwhelming. The new write screen only displays the information that you’ll use most often. It displays the most common fields in a way that makes posting incredibly easy. Additional options are hidden away until you need them. The new Write screen anticipates the natural flow of the way you write, and is smart enough to remember the way you left it so that your preferred writing environment is always quickly available. The new visual editor even has a handy full-screen mode to help block out distractions while composing your newest post. (My personal favorite new feature.)
Manage
REF: http://wordpress.org/development/2008/03/wordpress-25-brecker/
http://westi.wordpress.com/2008/03/29/wordpress-25-in-detail/