WordPress 3.6 Beta 3 is now available for download and testing. What’s new in this beta?
improvements to the image Post Format flow.
a more polished revision comparison screen.
a more quote-like quote format for Twenty Thirteen.
oEmbed support for the popular music-streaming services Rdio and Spotify.
Other wordpress 3.6 features:
Own Post Formats UI.
New Twenty Thirteen default theme.
embed audio and video files into your posts without relying on a plugin or a third party media hosting service.
Posts are now autosaved locally.
New Post Locking.
Nav menus with an accordion-based UI, and a separate tab for bulk-assigning menus to locations.
new revisions UI features avatars an a slider.