Thanks for all the replies.
I've begun differentiation between "boob coma" in the daytime and actually naps. It seems he almost always falls into a sort of passed-out state when he has a full tummy, but laid down or kept in the lap, he wakes about 10 minutes later. That's a boob coma. When it is time for an honest to goodness nap (and with my first two boys I never made such a distinction because I made no attempt to keep their sleep on a schedule, but with this one I am)-- he is happy to fall asleep on my chest while rocking, in the sling, or just in my arms walking around the house (that's his favorite). He makes no requests to nurse during those times. But he also pulls off the breast when he is full and entering boob coma... so it's likely he's a different kid that way.
I have to say-- scheduling a newborn seems like an incredibly unpopular notion (particular when it comes to scheduling feeds, which LLL and the AAP have statements against it). However, I've tried since he was one week old to get him on a schedule, proceeding very cautiously, and so far, it has been great. He is nursing well, sleeping well, and seems to be very content. I feel so lucky. I'm glad I researched schedules a lot before he came along, but so far the transition to momming three has not been nearly as bad as the transition to momming two was for me! I chalk it up to having some structure to fall back on to make sure everyone's needs are being met.
Oh, and at night-- we boob freely. EC or no, I've decided it's easiest, and I mean that for me, too. I'm not a good sleeper, and I count on that oxytocin release to help *me* fall back asleep easily. Ain't no way I'm getting out of bed to walk him down at that point! But at bedtime, that's what we do.
So far, so good!!