Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
You should know by now: KDE 4.0-alpha1 "Knut" was released on May 11.
I've downloaded the openSUSE "KDE Four Live" CD that features it (it's KDE-Four-Live.i686-0.1.0.iso, redirecting to a list of mirrors; MD5: 029d80aeb4d0fc15c27a06f4f74ed1d5; user: linux, password: linux), and I tried it, hoping it's really more advanced than KDE 3.80-3 to bear the Alpha1 status.
It is not that advanced.
I am not impressed by anything. Maybe the KDE 3.5 project is something that started too many years ago to be:
(1) ported to a new Qt;
(2) cleaned to match the KDE Human Interface Guidelines;
(3) enriched with completely new application and features;
(4) completely redesigned under the hood: Oxygen, Plasma, Decibel, Phoron, Kross, Solid; in a such small amount of time.