well it has also already been posted that the X3 IR adaptor has not been developed yet and that they are concentrating on getting their current projects completed before they start any new ones. sounds sensable to me.
If you are wanting an IR Mod so badly, go with the XIR. it works and will integrate into your proswitch or control panel just fine. You will probably be waiting for an xecuter specific solution for a while. they have their hands full as it is.