Okay, maybe I shouldn't call it that just yet, but today Ant has taken two naps IN HIS CRIB, with nary a peep!
I decided yesterday that what I was doing wrong was letting him fall asleep on me, then trying to put him down after that. So today when he was in his tired phase after being up for 1.5 hours, I took him into his bedroom, shushed him for about three minutes until his eyes were closing, then put him down in his crib and shushed him for a few more minutes. Worked like a charm! He seemed to sleep much better, and I got to make my mom's bday cake for tomorrow. And it worked twice!