I have heard they make overnight diapers in smaller sizes (not just training pants). We haven't needed them so I haven't looked into it myself, but I have read about them a lot on here.
I've found the Parent's Choice brand (I think it's Wal-Mart's store brand) is awesome for night-time. I had a bunch from a diaper cake my friends made for my shower. I use the next size up for nighttime and have never had a leak. Granted, it's about a 5-lb diaper by morning, but she's still dry!
Re: Best Absorbent Diaper Out There...
I was going to post this same question! I've tried Swaddlers and Baby Dry, neither can hold up through the night.