Check this out:
www.dadsdivorce.com
This is THE resource for Dads who want to be part of their kids lives through divorce. it's run by some attorneys who have big time followers on the forum. I was an active member while going through my divorce and the resources were excellent.
This is a HUGE market in mainstream. Your domain is great. These guys even travel around and put on seminars for dads now. There is a lot of room for competition here.