Yes, yes they do. The "Magic Band" is in use all across the Walt Disney World resort in Florida, and is expected to be deployed for Disneyland Resort in California as well. Short-range RFID acts as your hotel key (if staying at a Disney Resort Hotel), your park ticket, your FastPass for rides, and, of course, is used for payments.
Long-range RFID allows them to track the bands around the parks for crowd control and planning - such as when to deploy more Cast Members to deal with traffic flow, etc. And they use them for some 'customer experience' things, such as telling a costumed cast member that the family approaching has a child celebrating a birthday, and the child's name, so they can provide a 'magical experience'.
It is awesome in multiple meanings of the word. Personally I rather like the system - both from a customer perspective, as well as something to geek-out about on the tech side. Even before Magic Bands they had cameras everywhere, so I always figured I was probably being tracked anyway - along with everyone else - as a data point if nothing else.
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