Does she provide prenatal and/or postpartum visits?
What can you expect during these visits, if offered?
How many births has she attended?
Can she provide references?
What form of training has she had?
What types of births has she witnessed (Cesarean, epidural, intervention free, VBAC, teen birth, etc.)?
Her fee? And does she have a sliding scale or other arrangements available?
Has she ever worked with your care provider or at your place of birth?
Does she have back-up arrangements available?
What will her role be in early labor?
Will she provide labor support at your home prior to going to the place of birth?
Is she familiar with many methods of childbirth?
How does she define her role during labor and birth?

The bottom line is do you and your partner like her.