SPB Mobile Shell 3 for Windows Mobile versions 5 and higher is now available for purchase. Interesting new features include a fresh design for Windows Mobile, thumb optimization icons along the bottom for quick access, support for gesture/swiping, integration to Facebook for importing goofy friend photos to contacts, and kinetic scrolling (aka flick scroll or rubber band man).

More goodies include:

Widgets
Facebook integration
3D carousel
Widget-based photo contacts
Ringtone management
Wireless manager
Finger friendly agenda view
Improved task manager
Now works as a true home screen featuring Professional Home and Lifestyle Home

SPB Mobile Shell 3 and FAQ