Puhh.
Finally someone put an end to these lies about macs using IBM controller chips (I have a mac myself so i know :-) ).
In fact Apple once tried to licence out it´s technology, but it didn´t work out as they expected, so they ended the licence program.
The IBM "alternative" controller that everyone talks about does not have AGP support and it´s not aimed at the same marked (low cost mobos) as the Articia S. Neither have the Marvell controller which there has been some rumours of being used by an Amiga competitor for their next computer model.