Robots - I agree with everything Joe said about it. Pretty, but hollow. I was particularly bemused by the female love-interest character: She seemed to take the main character's side for no reason other than that the "Female Love-Interest" character slot was unfilled, so she slid into it solely in order to fulfill that expected role in the story. Also, the Rube Goldbergian "Crosstown Express" scene at the beginning was cute, but it really needed to have then become a running joke through the whole movie: Off in the background of city scenes, we should have occasionally seen one of those cage-balls whizzing through the air with a faint "aaaaaaAAAAAAAAaaaaahhhh!" audible. That sort of thing.
Land of the Dead - That's the way to do it! And yes, that's a reference to the Zombie Punch and Judy puppet show briefly visible in one scene. I'd say overall that this is not quite as good as Night or Dawn, probably about on par with Day. Certainly better than the Resident Evil movies, roughly equal or slightly better than the Dawn remake. And Romero demonstrates once again that zombies don't have to run fast to be menacing. Still, I think I'll imagine that this takes place somewhere in the middle of the earlier movies, before the events depicted in Day of the Dead (or perhaps even the start of a completely separate storyline that just happens to share the element of zombies), simply because Day is so wonderfully, bleakly apocalyptic. I like to think of that one as truly being about the very end of the world.