Shape of things to come:
Q. Can Ironfists still be used as either shields or additional hand weapons in combat if the additional hand weapon is a special weapon.
A. Since special weapons take priority all ogre Ironfists must always be used as additional hand weapons.
... call me cynical but that just seems to be the way GW FAQs are going lately: but hey, you would be spending that extra point to have 'cool' looking models
Personally though I'm planning on getting rid of both my AHW and Ironfists from my bulls- its not worth the extra 24-45pts a unit (Im thinking units of 6-9) for +1-2 attacks (after you have a charctr or 2 in the front rank)... not so sure about using ironfists as shields yet, but since I normally rely on regen and I couldnt take both a 6++ and a 4+ regen I think I'll stay basic (yay, ogre clubs used once more- might have to use bullgorger just to get back to the -3AS that my Ironguts have always given me).