L.,
I literally just went through this!! My son just turned 3 and was potty trained to go #1 at 2, but I could not get him to do #2. I did the same thing you are doing now - asking for help from Mamasource. Nothing that the other mom's told me worked - not that they weren't great ideas, but they didn't work for him. The best advise I did get was from my pediatrician - "Just let them be and they will do it in their own time - offer a pull-up for poopy". So, I started telling him that if he had to go poopy he could put on a pull-up. It wasn't more than a day or to that passed and he was asking for a pull-up to go poopy. After a few weeks, I told him he could use his pull-ups, but he had to go into the bathroom to go poopy and that didn't seem to bother him. Then a few weeks went by and I told him that I wanted him to try and sit on the potty to do poopy, but he could leave his pull-ups on. This wasn't easy and he would only do it a couple times a week, but I didn't push it.
Then I had a light bulb flash in my head! Other parents have told me about the paci/binkie fairy where the fairy comes and takes away the pacifier and leaves a prize (just like the tooth fairy). I thought that if it worked for the pacifier (which we never used) then why wouldn't it work for this. So, I started telling him about the "pull-up" fairy and what she was all about. How one day she would come and take away all the pull-ups and leave a prize in the place where his pull-ups were. And that he would have to go poopy on the potty because the pull-up fairy thought that he was a big boy. This went on for about 6 months and I talked about the fairy every time we put on a pull-up asking him when he thought she might come. He got to the point where he would run to get a pull-up for me and to check to see if she had come yet.
Anyway - when she came she left a toy. That night he struggled and decided not to go on the potty, but he didn't go in his pants. The next day he did go in the potty and we had a great party. However, the following day he went in his pants. So, I took away the toy that the pull-up fairy gave him. Later that afternoon he had to go again and went in the potty so I gave him back his toy.
I know this is a long story, but this is what I had to go through. It wasn't this hard with my first - he did start to hold it, but the Dr. said to give hims some prunes. I got some and he loved them - so much that he ate about 10 of them in a row. Not more than 20 minutes after the last one, he looked at me and ran to the bathroom. He couldn't hold it! :-) From that point on he was fine!
Moral of the story - everyone has to do something different and as long as you don't push it, it will happen.
Happy New Year!
Sam