Here is the short list for Version 9 new features:
-Adds DVD copying.
-Improved encoders and better plug-in management.
Cross-fade and normalization plug-ins have been included as standard (free) offering.
-The Media Library now supports Microsoft's new XML-based Windows Media Metadata and "Smart Playlists."
-The metadata can be used to view and sort music and video by a variety of different categories, along with creating rule-based playlists.
-The search tool has received more prominent placement in the Media Library, and now supports advanced rule-based searches.
-A new tool called Advanced Edit.
-For each song or video, users can input a massive amount of details such as mood, beats per minute, Web sites, multiple comments, pictures and even
synchronized lyrics.
-A "Send to Friend" option allows users to send a song or video to others on MSN or Windows Messenger with a simple click of the mouse
For home users, a big addition is the ability to copy DVD movies to disk.
You can read about it all here:
http://www.betanews.com/article.php3?sid=1027134080