Westi on WordPress has published a list of the new developments in WordPress for the time period between December 17-23, 2007 with many new updates, some of the most notable including but not limited to:

• Fixes to the tag entry field to avoid erroneous blank tags.
• Fixes to the valid element configuration of the text/WYSIWYG editor to allow more valid combinations.
• Allow more valid titles - changes to sanitize_title() to allow ‘0′ to be a valid title.
• Visual - Improvements to the image metadata extraction functionality, PNG transparency and alpha channel preservation
• Install/Server Improvements - Check for valid database connection info, changes to wpdb class to suppress database errors by default, support for custom database down page
• Link/URI changes - Changes to sanitize_title() to allow ‘0′ to be a valid title, links relevant to the comment editing screen
• Password strength meter to user profile pages.
• A new admin design - with screenshots hopefully coming next week.

Of these, the top changes I would like to see would have to be the admin interface, server-side changes to make WordPress more secure, and as always, little fixes for images and linking. By the way, less than one month until WordPress 2.4 is released.