The example you gave helped me understand the point of the :-moz-any selector but I’m not sure you if you should change the example to something a bit more realistic because it looks like you could do the same thing with just…

.lists li { property: value; }

…rather than the long winded…

.lists :-moz-any(ul,ol,menu) li { property: value; }

Just a thought :)

Thanks for the post, it was very interesting.