One of the best sites I've found is www.thepsychoexwife.com. A husband/wife team created the blog to deal with his psycho ex wife... she sounds exactly like the crazy bio-moms we read about on this site. They do some marriage talk in there too.

Personally, I don't mind posts that are marriage related - whether the issues are caused by skids or not. I think most of us are marriaged or in long term relationships and go through things and could use some support.