I'm still new to KDE4 and I figure there may be others in the sme situaton.
I was poking around the web and on my PCLinuxOS system and found a couple of things.
A FAQ at the KDE site states, "Look through the KDE Help Center. KDE ships with a Help Center application that has all the KDE application documentation as well as quite a bit of system documentation in one searchable place. It also includes a few "quickstart" guides. This is always the first place to look for answers to any KDE question."
if I miss my guess, this can be found at Menu>More Applications>Documentation>Help. The KDE Help Center comes right up.
Also, I found an online KDE4 visual user guide at:http://www.kde.org/announcements/4.0/guide.php
This has already been a big help to me as I just learned about pressing "Alt F2" to get Krunner!:)