Well, I had the first half of that down really well. My preparing for the worst consisted of me saying "Yeah, twins often come early so maybe instead of the end of March (3/27) it'll be the beginning. Gee, I hope they don't come on my brother's birthday (3/6)."
Yeah, they came on my FIL's birthday, instead - 1/10. I had no clue. I was totally unprepared for the NICU, and this despite having spent two freaking weeks on strict hospital bedrest with PTL prior to the birth. WTF was I thinking?!
For me, that lack of preparation dovetailed nicely with being a first-time Mom with zero breastfeeding experience. Awesome! Cue the mad scramble to get a hospital grade pump before I was discharged, and cue months of struggle. At least that bit will be familiar to you, having done it before (though yeah, preemies are different for sure, at least you'll know what the heck "right" feels like.)
Do you have "Mothering Multiples"? She did a pretty decent NICU chapter, IIRC. It's probably enough to just sort of give you some kind of background, and it's not so much reading that it'll be a huge waste of time when you have 41-week 7-pounders.

Other than that, you already know there's a NICU/Preemie forum here, which I wish I had known back in January of 2010. If you end up needing to know more, it's a great resource.
I guess if I were doing it again, I wouldn't go nuts preparing for it, but I wouldn't go as far deep into denial as I did.
How many weeks are you now?