Screen capture software and I apparently don’t mix so you’ll have to take my word for it from a still image, but this is fun:

What you can’t see is that those pigs are in a staggered line and they are moving in a preset pattern across a small part of the world.  The only reason this is cool is that their movement is control by … wait for it … THE SERVER!  So everyone connected sees the piggies move in exactly the same way at exactly the same time, which is awesome.  This is, hopefully, the very beginning of having enemies controlled by the server that players can actually interact with.  Fun stuff.