There have been numerous articles that have stated that KDE 4.0 is not a finished product and is for early adopters only. Of course there are missing components so far.. KDE 4 will gradually gain feature parity with the KDE 3.x series.
As for your kicker which is called a panel in KDE4, it depends on what version of KDE4.0 you have. You may be able to right click the desktop and click the add panel item in the context menu. If that is not there you can try this:
kquitapp plasma; rm /home/$USER/.kde4/share/config/plasma-appletsrc; plasma
Just paste that in a konsole.