Hi Cath and Denise
Lea is right, in QLD the NB mum can't be on the birth certificate yet. I *think* the NB mum can be the informant for the birth certificate but I don't know for certain (will let you know soon enough!). In terms of rights for your partner I would be looking at a Parenting Order, which makes her another legal guardian, and basically means she can do things that are automatically granted to the bio mum like authorise medical treatment etc. You can't actually apply until after bub is born but it is good to get the papers organised once you get pregnant so that everything can just be signed once bub is born.
In terms of a known donor, well I'm not really exactly sure (we used unknown). I think the biggest issues would be access, parenting roles (so what you will all be known as and what you'll do in those roles), support/maintainance, what happens if you and the sperm donor disagree on something, or he changes his mind about something, and wants full custody, and also the birth certificate. Make sure you have a parenting agreement/contract between the three of you. Of course, it doesn't always stand strong in court but at least you have it there to show intent of the kind of family structure you all wanted at one point in case things don't go to plan. And also the big ones between you and your partner, which you've probably already throught through.
HTH