I'm in the process of deciding whether or not to take postpartum doula training. I confess I'm not quite sure what the job description is, since it will vary so much. It would be nice to increase my skill set and I'm sure that a lot of the baby care stuff would inform my work as a birth doula in the immediate postpartum period.
Here's CAPPA's definition of postpartum doulas: CAPPA
A postpartum doula is a woman who assists the new mother, baby, and the rest of her family within the first few weeks after the birth of the baby.