THEY SLEPT!! THEY SLEPT!!! I don't know what happened, but after a slight bout of fussiness at around 10 p.m., both boys zonked out and slept through till their appropriately timed feedings, after which they quietly zonked out again. I actually managed one or two extended stretches of sleep which has me feeling positively celebratory today.
And truly, I don't know what we did differently, other than the fact that we never even tried to put them into their bassinet, instead putting them to bed right next to us. I know there are strong opinions in both directions, and I may regret the decision to let them sleep in our bed six or eight months from now, but that will also be six to eight months during which I (and they) have hopefully slept well.
Sigh. I don't know-- I'm just feeling all of this out as we go along. There may come a time when I will want to use some expert plan or another, but for now, we're just figuring out bit by bit what works for us. The co-sleeper unit thingy arrives tomorrow, and we will see whether it works or not. We are also considering putting an extra mattress on the floor of our bedroom, so that I can sleep there with the boys one H goes back to work (so he can get a bit less disrupted sleep, but still be close by for times when I need help, and so the boys and I can spread out a bit). Again, we'll see what works for us.
Ah, and now, duty calls (in the form of doodie, courtesy of Sweet Jack... I love that he smiles in his sleep after he fills up his diaper... weirdo. And Henry has started this kind of whimpery noise after he sneezes: "ACHOO! *siiiiiigh*" Weird boys.). I really appreciate all of the advice, and will continue to consult all of it as we try various ways to make it through this surreal newborn time.