Elimination communication (EC) is something I first heard about not too long ago. Monday I checked a book out from our library because I wanted to know more. It's "The Diaper Free Baby" by Christine Gross-Loh. The general idea is that babies are born with the instinct not to soil themselves and we can learn to communicate with them about their toileting needs, like reading their hunger cues.
EC involves observing your baby's body language and patterns, cueing your baby (holding your baby in a certain position and making a certain sound that she associates with peeing or pooping), and changing her as soon as possible after a miss so she doesn't get used to sitting in a wet or dirty diaper. Some people start EC at birth, while many start at around three to eight months.
If EC sounds interesting to you, I encourage you to read this book and read it now. I enjoyed it and it made a lot of sense. I only wish I'd heard about this when Jesse was younger. He just turned 2, so it's a little late to start EC (at least as described in the book). I'm planning to try a modified version tomorrow. I was telling hubby about EC the other night when he interrupted me and said "Before you go any further, we're not having another baby just so you can try this." I laughed and told him that's not why I want another one!