Yeah, that's where they should be, and Synaptic says that theme is installed -- but it's not there, and I looked in /usr/share/icons, too, and I see the other mouse cursor themes as well as the icon themes there, too. But not the aero one. Strange...
EDIT -- I just looked again, and I think they may have been there the whole time. For some funny reason, I was expecting them to appear before "Default", since A obviously comes before D in the alphabet. But for some funny reason, Xfce's mouse cursor theme dialog puts "Default" first. If that "Aero" entry had been a snake, it woulda bit me! Boy do I feel like an idiot...anyways, I have my theme. Thanx!