For the Mumma,
You could put together a hand care package as multiple handwashing is mandatory in NICU/SCN, mine were like sandpaper after the first week.
A nice journal for her to write in.

For the Pappa,
If he has to go through tolls- a prepaid E-tag. In Qld I think the cheapest in 25 a month.
Most hossy's have a parking ticket plan thing that lasts a week. It usually works out alot cheaper than paying as you go. When I was in RBWH it was $15 a day but $45 for a weekly multiple entry ticket.

If you are into scrapbooking or know someone who is that might be nice. I cant think of much else right now.