I had a HB with DC1 and am planning one with DC4 (if he or she ever appears - 39/40 now and feeling like it is never going to happen!).
I'd really encourage you not to be too set on having a home birth but to keep an open mind because something might happen before your due date or even when you are in labour that means it is not a good idea or you need transferred etc. Not having a home birth will, by no means, mean that you have failed.
That said, women who have delivered before are no more likely to have problems for either them or the baby (risks are slightly higher for the baby in first time mothers) and even starting at home and having to be transferred in is still associated with a reduced risk!
With DC1, it was just lovely being able to potter about at home, make tea when I wanted, carry on with chores to distract me (I remember telling my DH to put the bins out for the following day), and then all get into bed together afterwards. It really wasn't, as Paleontologist says, messy at all. My hospital asks you to get bubble wrap or a shower curtain and an old towel to cover it to protect the floor/sofa/wherever you give birth. The MWs took it all away at the end.
Make sure you've got biscuits, bread, tea and coffee for the MWs as they might be there for a while. Ours made themselves at home and looked after themselves, sitting quietly on the floor on the other side of the room and let me get on with it. (I had a main midwife and student MW there for most of the time and then another MW joined her for the delivery. It was the student's first HB.)
Think about how warm your house is. If you are 28 weeks now, you are due in mid-December. We were told to make sure that as soon I went into labour to make sure that the boiler was on to ensure there was plenty of hot water for the birth pool and put the heating on so it was lovely and warm for the baby.
I hired a birth pool and thought I would love it and just didn't get on with it all, so I am not bothering with one this time at home, although if I end up in the birth centre instead, I'd try the birth pool this time.
Anyway, a bunch of random thoughts!