KDE 4 live for testing available.

For those wanting to get their hands on the latest release of KDE, the developers have a live CD based on Open Suse10.3 ready for download and be tested. Note that this is an early unstable Alfa release and not suitable for end-user, so count with bugs and some applications like KControl don't work so well if not at all.
The Dolphin file manager makes a good impression although is not completelly prepared for everyday use.

Highlights of KDE 4.0 Alpha1 are:

• A new visual appearance through Oxygen
  
• New frameworks to build applications with, providing vastly improved hardware and multimedia integration (through Solid and Phonon, spelling and grammar checking, to name just a few)
• New applications that focus on a smooth user experience, such as Dolphin, the file manager, and Okular, the document viewer

For more information visit the KDE website.