Y'all rock!
After delivering my package to one of my neighbors - who was kind of enough to bring it by - I hooked up the new cables to a headset I have at the house (because A) of course I have a spare headset here, and B) I wanted to see if it was the old set of cables) and squeal squeal squeal.
Put a couple of those ferrite thingies on the cables as advertised and all gone.
Neato.