The job market seems to vary week to week. For example, I am on a listserv and last month received notice of over a dozen job openings in my state. The ACNM website did not list any of these jobs. So the website is a good place to start, but is not the end-all-be-all.
If you are contemplating midwifery, it may be a good idea to find a CNM where you want to live and get info from her/them.
Another way to determine interest is to write physician practices and give them some information on how a nurse midwife might assist with their practice. One of my classmates did this and recieved a response from many OB and FP practices that never thought about adding a CNM to their practice.