newb question: user switching in KDE?

[Ignatz Sol <flyingrobot@gmail.com>]

I am a recent convert to Linux, running Debian sarge/testing with KDE
3.2.2.  I am interested in setting up some sort of user switching, so
that my wife can have her setup separate from mine.  I've been
especially inspired by the switching available in the new Mac OSX. 
Now I don't need anything fancy, and I've found a few references to
this (like this link, http://www.mepis.org/node/view/2083, though I
haven't been able to try it out yet).  Just want to be clear as to
what is the best way to facilitate this.  I will also need to be able
to switch with an icon or something similar to make it simple for my
wife.  Thanks for any help.