Release Notes: There have been more updates to the Post Formats UI, including image drag-and-drop support for the Image format. There is now oEmbed support for Rdio and Spotify, a more polished Post Revisions display, and improvements to the new TwentyThirteen theme.
Release Notes: There were many bugfixes between Beta1 and Beta2, but the biggest change was a new approach to the Post Formats UI, which has done well in user testing.
Release Notes: New features include but are not limited to a new UI for Post Formats, Twenty-Thirteen, an opinionated, colorful, blogging theme, improved audio/video embedding without needing to rely on a third-party service, auto-save that uses browser local storage to keep your edits even if your server or browser crash, post-locking that improves post editing when more than one person needs to edit the same post, improvements to the Nav Menu user interface, and a new revisions feature for comparing edit histories.
Release Notes: Major work was done on the TinyMCE WYSIWYG editor, creating a custom schema to adhere to the HTML5 living standard. It should now handle unusual OBJECT/EMBED situations, among other things.
Release Notes: Final UI improvements to the media manager. Better reporting for upload errors. Improvements for mobile, IE, and RTL languages. A cookie fix for sub-domain multi-site when installed in a sub-folder.
Release Notes: This will probably be the final release candidate before the official release of WordPress 3.5. This version has a completely new media library, Dashboard streamlining, new performance enhancements for Multisite, the ability to enable Multisite when installed in a subdirectory of the document root, and other features and enhancements.
Release Notes: The new Media Library has some of the most significant changes.
Release Notes: A new workflow for working with image galleries, including drag-and-drop reordering and quick caption editing. A new user interface for setting static front pages for the Reading Settings screen. A new image editing API.
Release Notes: Changes coming in WordPress 3.5 include a simplified welcome screen, a new color picker, and HiDPI graphics (AKA "retina") throughout the Dashboard. WP_Query can now return posts in a specific order with the post__in parameter. New Posts and Comments APIs are available. There's now support for protcocol-relative links when enqueuing scripts and styles. Updates have been applied to SimplePie, jQuery, jQuery UI, and TinyMCE, and newly-added Underscore and Backbone libraries. A revamped Media Library is still in development.
Release Notes: This release has a new batch of bugfixes and minor changes. There is a new menu_page_url() function that will make it easier to link between multiple admin option pages. The is_post_type() function has been renamed to post_type_exists() to make its purpose more clear and avoid confusion with the other is_*() conditional functions. Barring any unforeseen problems, this will likely be the last release candidate before the official 3.0 release.