Kaz - a chat with an IM about HB can really help partners understand what HB is. Men are just as inculcated in the idea that a hospital with men who 'know what they're doing' is the safest place to birth. Men also respond very well to facts and figures "Safer Childbirth" by Marjorie Tew is a good one for throwing open the lid on the monopoly hospitals have on birth despite their not so great comparable record.
I also agree with Kate, not appreciating the way Janet's outcome is used as an argument - that can happen and DOES happen quite a bit more often in hospitals than at home ALthough DOCS can become involved, so that IS a good heads up.