I noticed that in ssp nbt only gets saved once, when you exit the world. Do I need to do anything special for smp?

By that I mean, when another player uses the block does it automatically update the tileEntity.

I meant the differences in packets on ssp/smp. I noticed that packets/nbt only gets read on world load, so I was wondering if a player updated the tileEntity, would the packet get sent automatically on smp.

SMP / SSP have no differences in packets.

 

As long as you do this:

	@Override
public Packet getDescriptionPacket() {
	NBTTagCompound nbtTag = new NBTTagCompound();
	writeToNBT(nbtTag);
	return new S35PacketUpdateTileEntity(xCoord, yCoord, zCoord, 1, nbtTag);
}

@Override
public void onDataPacket(NetworkManager net, S35PacketUpdateTileEntity packet) {
	readFromNBT(packet.func_148857_g());
}

Your TEs will update properly.

ok thanks, that's all I was wondering.