Highlights of KDE 4.0 Alpha 1 are:
KDE 4.0 Alpha 1 marks the end of the addition of large features to the KDE base libraries and shifts the focus onto integrating these new technologies into applications and the base desktop. The next few months will be spent on bringing the desktop into shape after two years of frenzied development leaving very little untouched.
The final release of KDE 4.0 is expected in late October 2007.
The work on the framework makes application development easier and more satisfying. This will result in a crop of new features and applications over the next few years, underlining the position KDE holds as the leading Free Desktop and bringing Free Software to new users worldwide. A detailed release schedule can be found at techbase.kde.org, the new technical resource accompanying the platform, that provides extensive and high-quality documentation about KDE.
More information such as screenshots and installation instructions can be found in the KDE 4.0-alpha1 Visual Guide.