I'm having one too, this wednesday to be exact! This is my 3rd baby though so my luggage is light since most of your necessities the hospital provides.
I have my own underwear to go home in, since you're having a c-section bring granny panties because they sit high above the incision and are very comfortable. Bring maternity pants to go home in also, and whatever shirt you want to go home in. You only need 1 outfit.
I packed my own travel size toothbrush & paste, face wash, make up (I like to wear it when my visitors come), camera, phone charger, hairbrush. You don't really need anything to keep you entertained since it's all planned and you will only be in the hospital a few hours before baby arrives, the rest of the time you'll be too busy with baby, but you could always bring a magazine or book in case.
They'll supply all of baby's needs so you really just need a going home outfit. Good luck!!!
at 2:15 PM on Jan. 9, 2010