The latest and greatest WordPress, version 3.6, is now live to the world and includes a beautiful new blog-centric theme, bullet-proof autosave and post locking, a revamped revision browser, native support for audio and video embeds, and improved integrations with Spotify, Rdio, and SoundCloud.
Colorful New Theme
Introducing Twenty Thirteen
The new default theme puts focus on your content with a colorful, single-column design made for media-rich blogging.
Inspired by modern art, Twenty Thirteen features quirky details, beautiful typography, and bold, high-contrast colors — all with a flexible layout that looks great on any device, big or small.
Write with Confidence
From the first word you write, WordPress saves every change. Each revision is always at your fingertips. Text is highlighted as you scroll through revisions at lightning speed, so you can see what changes have been made along the way.
It’s easy to compare two revisions from any point in time, and to restore a revision and go back to writing. Now you can be confident that no mistake is permanent.
New Menu Options!
WordPress 3.6 Comes with New Navigation Options! Its changed old menu function outlook replace with new outlook. There are a extra Tab for manage menu locations.
Never lose a word you’ve written. Autosaving is now even better; whether your power goes out, your browser crashes, or you lose your internet connection, your content is safe.
Better Post Locking
Always know who’s editing with live updates that appear in the list of posts. And if someone leaves for lunch with a post open, you can take over where they left off.
Support for Audio and Video
New Media Player
Share your audio and video with the new built-in HTML5 media player. Upload files using the media manager and embed them in your posts.
Embed Music from Spotify, Rdio, and SoundCloud
Embed songs and albums from your favorite artists, or playlists you’ve mixed yourself. It’s as simple as pasting a URL into a post on its own line.
(Love another service? Check out all of the embeds that WordPress supports.)
Under the Hood
The new audio/video APIs give developers access to powerful media metadata, like ID3 tags.
Themes can now choose improved HTML5 markup for comment forms, search forms, and comment lists.
Search content for shortcodes with
has_shortcode() and adjust shortcode attributes with a new filter.
Fine-grained revision controls allow you to keep a different number of revisions for each post type.
New and updated libraries: MediaElement.js, jQuery 1.10.2, jQuery UI 1.10.3, jQuery Migrate, Backbone 1.0.
Source: http://wordpress.org/news/2013/08/oscar/ & WordPress Dashboard