I agree with ALL the other pps!
As long as you have a few sleepers, diapers, and beds for the babies - everything else can fall into place in the next few months after they are born. Take some time for yourself and go out and relax. If it's a choice between cleaning/organizing and going out with my friends, I'm going with my friends every single time. The to-do list will still be there when I get back, but I'll be much less stressed after some downtime.
And yes, if I was the friend, I would be insulted that I was blown off for a check-list, when I would know that there will be many times after the babies born that the new mom can't come out for legitimate reasons.