WordPress 3.6 Beta 1 is now available for download announced wordpress.org. “This is software still in development and we really don’t recommend that you run it on a production site — set up a test site just to play with the new version.”
What’s new in 3.6:
Post Formats: Post Formats now have their own UI, and theme authors have access to templating functions to access the structured data.
Twenty Thirteen: We’re shipping this year’s default theme in our first release of the year. Twenty Thirteen is an opinionated, color-rich, blog-centric theme that makes full use of the new Post Formats support.
Audio/Video: You can embed audio and video files into your posts without relying on a plugin or a third party media hosting service.
Autosave: Posts are now autosaved locally. If your browser crashes, your computer dies, or the server goes offline as you’re saving, you won’t lose the your post.
Post Locking: See when someone is currently editing a post, and kick them out of it if they fall asleep at the keyboard.
Nav Menus: Nav menus have been simplified with an accordion-based UI, and a separate tab for bulk-assigning menus to locations.
Revisions: The all-new revisions UI features avatars, a slider that “scrubs” through history, and two-slider range comparisons.
Download 3.6 Beta 1 and more info at: http://wordpress.org/news/2013/04/wordpress-3-6-beta-1/