For all the exciting new features in Adobe Premiere Elements 9, see http://www.adobe.com/products/premiereel/features/?view=topoverall
I have had great fun working through these features as they took shape, and I am sure you will have a great time too.
The user interface of Adobe Premiere Elements 9, Adobe Photoshop Elements 9, and Elements 9 Organizer has been enhanced to provide you with consistent experience across Adobe’s products for creative professionals.
Most importantly, Adobe Premiere Elements 9 is now available on Mac OS, and so is Elements 9 Organizer!
There have been significant enhancements to the face recognition workflow in Elements 9 Organizer. For more information, see http://help.adobe.com/en_US/elementsorganizer/using/WS2fa0b309bba5bdb17ad2d3dc1229c60c39c-8000.html
For improvements to handling offline files, see http://help.adobe.com/en_US/elementsorganizer/using/WS2fa0b309bba5bdb119f7512b12217459fbc-8000.html