OK, I am a little closer maybe. I TodoLockInfo enabled in winterboard and I can now see a section for Todo, but it says "Native rendering not supported" What does that mean, and how can I make the todo's show up?
Sounds like you need a lockscreen theme in addition to what you already have.
Native rendering is what shows when you have no lockscreen theme installed, but since it's not compatible, you will have to add a lockscreen theme and enable it in WB
Make sure it's a lockscreen theme that supports ToDo, there are not very many that do