I've played around with the idea of getting a 64GB model but with iCloud, iTunes Match, and Dropbox, I just don't really see a need.
I have a 64GB iPad 3 for when I travel to store media such as movies, music, etc.. on so I'll probably go with 32GB again like my 4S. Enough space to take a crap ton of pictures.
And of course, white. I've gotten so used to photographing white iPhones in heroes, I don't want to switch and face the wrath of Leanna if my heroes aren't as good
I won't be pre-ordering though, just gonna wait in line and give out iMore t-shirts