The Amarok 2 beta is available in Debian unstable as of yesterday
(I think). Looks very promising, indeed. Nowhere near finished, but
cool and quite functional nonetheless.
Kontact
I just started the KDE4 version of Kontact the first time and
instantly placed it on one of my extra laptop buttons, replacing
Liferea.
KDE4
KDE4 shapes up to be excellent. Though I will
probably be staying with Window Maker for a long time (which is a
pity, because I never really get to use Martin's work) I
find myself using more and more of the KDE4 applications.