Full package name: kde-misc/kicker-compiz
From the kde-apps.org project page:
"This is a modified pager applet for kicker to make it work with compiz. More generally, it is intended to work with window managers that use the concept of "large desktops" instead of "multiple virtual desktops" as kwin does exclusively."
I quite like the fork because it provides boarderless transparent snippets of your desks.