  When I picked Aidan up from school a few days ago, his teacher told me she thought he was ready to try potty training in full.
I've tried two different methods so far and both times failed miserably. I tried sewing cloth diapers into his underwear and I tried six days of bare bottoms before I went batty from wiping his bottom every five minutes all day from excessive pooping. When he started school, I explained that he'll go every time you sit him on the potty, but he doesn't initiate it at all.
So he's been going with the other kids at planned times, but wearing diapers, too. I really hoped the peer pressure thing would work in our favor and encourage him to really get into the action. So yesterday I took Aidan to school in underwear and gave his teacher no fewer than five changes of clothes. Turns out I should have given her socks, too. Yesterday he had three accidents, but today he only had two. The big improvement today has over yesterday is that he woke from his nap and went to the toilet before he had a chance to have an accident.
Also, when we got home yesterday, he had three accidents in short repetition before I gave in and put a pull-up on him. Today he is still in underwear, no accidents, and we've been home for several hours. Much progress! I'm so happy with his teacher, she really likes Aidan and is so intuitive to his needs. This success is in large part due to her. 
