The rhn-applet does not show up in the kdepanel -> Add -> Applet list. Moreover I found no other way to start it under kde (except for starting it from konsole). Shouln't the lines Exec=rhn-applet Typh=PanelApplet in /usr/share/applets/Monitors/rhn-applet.desktop read Exec=rhn-applet-gui Type=Service
it's not an applet, it's a systray application (despite the poor naming...). you have to start it from the command line. reassigning the menu portion to redhat-menus component
It seems to be in the menu now.