While cleaning up the navigation at a customer installation today, we ran across something rather interesting.  If you export the CRM SiteMap and look for any of the Quick Campaign entries, you will find the following:
<SubArea
Id="nav_minicamps"
ResourceId="Menu_Label_Mini_Campaigns"
DescriptionResourceId="Quick_Campaign_Description"
Icon="/_imgs/ico_18_minicamps.gif"
[...]