The June 2007 issue of Above Rubies magazine, which is a Christian magazine devoted to stay at home moms, has an article this issue about a mother who had HG with each of her seven children. The author does call it HG, but then she goes on to mention it as morning sicknes. She also lists a "How To Help a Mom Cope with Morning Sickness" top 10 list. It's actually pretty good.
Her contact information is in the article. Also, she lists a website www.mymorningsickness.com. I haven't gone to check it out yet.