This appears to supposed to be part of the BerliOS suite of apps but I can't even find it on their website anymore. http://xfce-goodies.berlios.de/#projects
Thank you.
** Changed in: xfce4-panel-menu-plugin (Ubuntu)
Status: Confirmed => Needs Info
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[UNMETDEPS] xsim has unmet dependencies
https://launchpad.net/bugs/41526