My DH is a master of nappies, too, it's great. He has been very hands on from day one - and even before, if you think of it, considering the countless back and foot rubs he had to give me when pg 
I'm hoping to bf exclusively this time, so am prepared to do the night feeds - with DS, we had to do mixed bf-ff, as DS didn't seem to be getting enough from me (turned out he had tongue tie), but it meant that DH could get involved with the feeding, too.
But I agree with OneLittle, there is so much that dads can do - if the mums let them, that is. Sadly, I have seen it happen when the mum becomes so involved that she literally pushes the dad to the side... Not good.
All this talk about feeding etc makes me suddenly really want to be on mat leave again... Not having to bother to get dressed and leave the house in the morning and getting lots of newborn cuddles, awwww 
Counting down the months/days till November!