This isn’t the only resource for being a good birth partner or understanding pregnancy and birth on the Internet. Here are a few other resources I’d recommend checking out:
The Art of Manliness ran a series called “A Man’s Guide to Pregnancy”. Start with How to Take Care of a Pregnant Wife, read about the gear you’ll need in Getting Ready for the Baby Bomb, and wrap up with information about helping with labor in Your Progeny Enters the World.
BabyCenter’s UK site has a good article on the role of a birth partner. In general, BabyCenter is a pretty good resource, with a lot of articles, newsletters keyed to baby’s delivery date, and online tools. Most are intended for mothers-to-be and mothers, but many will be useful for birth partners.
Mayo Clinic has some excellent articles about pregnancy, labor, birth, and related topics of interest to a birth partner. Unfortunately, they don’t seem to have a good starting page. If a Mayo Clinic link shows up when you’re searching for information, it’s a good bet.
WebMD’s Pregnancy Center is another good resource full of articles, videos, and online tools.
Just remember, whenever you find an article that worries you, sanity-check it with someone (a doctor familiar with the pregnancy in question, a friend that’s tried out the baby gear in question, etc).