KDE 3.0 is mostly a release for supporting QT 3.0 rather than a full blown release with major new featues. Some new features (like font fading) and other minor visual changes do exist, but primarily this release will feature lots of new bundled KDE applications compiled for QT 3. Screenshots of KDE 3 can be found here (mirror page here) and even more info can be found at dot.KDE.org.
Looking very nice.
I am looking forward to this release because of the new Database connectivity, I have a Windows App I have been wanting to move to Linux/Qt for a long while and hopefully the database code in this will make it a much easier affair.