For anyone interested, I thought I'd put out a little information on Jonah's potty-training success. We used a book called, "Toilet Training in Less Than a Day" which was recommended by Sam's mom. It's an old one and out of print, but you can find it in places like Amazon that sell used books.
We actually successfully trained Henry using the same method. The basic theory is that you have your child "train" a doll to use the potty, then switch to trying it himself. Along the way you are rewarding all sorts of actions with salty snacks and LOTS of drinks, so there are ample opportunities to try the potty. The goal is to have them taking care of everything by themselves--without needing even a reminder to go potty. It really only takes a couple of hours (pretty dedicated hours), but I would definitely say that it works! Jonah is not quite 2 1/2 and he is wearing underwear all the time (except for a pull-up at night) and he even stays dry during his naps!
Henry actually completely trained in a VERY short time, while Jonah took a little bit longer. I think the reason for that is that I was able to dedicate myself more fully to the training with Henry--with Jonah it was a spur-of-the-moment decision and I didn't have anyone lined up to watch Henry--so he was a constant "help" (ie, distraction!). So if you have older kids, I would say that it's probably easier without them around! :)
As with any book that I read, I did have reservations on some of the specifics in the book. There are a few things they have you do that I don't agree with, and the book is certainly a bit dated (it was first published in the 70's). I won't bore you readers with those details, but if anyone is interested in using this method on your child--I would be happy to share with you more.