You've got a point--but I wonder if there's a way to combine them?
In my mind, I'm seeing an animated gif or a flash that alternates between "Free Mickey" printed under/over a computer mouse and "Free the Mouse" printed over/under the "mouse with bars" logo.
It'd make a great flicker button, too--I guess they still make those--and could be used as a text ad. I don't think it's right for a bumper sticker, though.
I like this, 'cause it links two endangered species of freedom.