I watched Disney's "Bolt" at a friend's house this weekend, and was struck by some very sneaky work in the opening credits (no, not hiding obscenities in the animation). Take a look:
Notice anything? Yep, that *was* Steamboat Willie as the LOGO for "Walt Disney Animation Studios." (now a division of the Walt Disney Company, created after restructuring in '07). Now, I'm not a lawyer and I certainly don't have specialized knowledge in copyright issues, but this seems to open the way for Disney to trademark Steamboat Willie instead of relying on copyright protections.