Yes, of course. I'd say that you just private messages [1] for that. I
don't think it matters too much that the messages don't originate from
the room itself, and for clients that don't have a specialized game UI,
I think it is very intuitive to interact with a game master.
[1] http://www.xmpp.org/extensions/xep-0045.html#privatemessage
Yup, this is certainly one way to do it, although at the moment as you
already know who the gamehost is I am directing the move/action messages
directly to it rather than via the room, which also means the games can
still happen without the room, without needing to change the
protocol/addressing.
Also as pointed out by Michal the protocol needs to be able to support
operation without a server so it would be better if it wasn't tied to
MUC and would work without it, without the protocol being much if any
different.
I haven't fully read the thread, but I'm not sure why that would be
true.
Im not entirely sure myself, but he was very insistent on this
capability so im working it in to avoid any further arguments on it.
Richard