CE's been diaperless (except for naptime and sleep at night) for almost a year already. When he wakes up from his nap, his diaper is usually just slightly wet. It has never been completely dry. But I wanted to give it a try.
Today I did an experiment. I asked him to pee before he drank his milk (he drinks 7 ozs everyday before his nap). Then I asked him if it's okay if he doesn't wear a diaper to nap. He said "okay". I kept reminding him that he needs to wake up to pee as he's not wearing a diaper. After he's finished his milk, I let him pee again. Then off to slumberland. I put a rubber mat under him, just in case. Halfway through his nap, I had to readjust the mat because he's no longer sleeping on it. Good thing he was sleeping like a log. :-)
He woke up about 1.5 hours later, without wetting his pants. Yay! He didn't even need to pee immediately. It's definitely a good start. Let's see how it goes for the next few days coz usually he'll nap for 2.5 to 3 hours. But I'll wait till he's really ready for the night time training. This mommy too lazy. :p