I was never diagnosed with HG with my son, but I started at 110 and lost almost 20 pounds from so much vomiting. I had an absolutely terrible time.
My partner wanted another child way before I was ready to think about it, because I was SO TERRIFIED of going through that again, and even more so about going through it with a small child in my care.
I did a lot of reading, and sort of stumbled on some very interesting stuff. I'll post a link to the thread that got me started. It resulted in me doing about 3 months of dietary prep work and cleanses before trying to get pregnant. I'm 13 weeks now and I have not thrown up. You can find my story in more detail in post # 66 of this thread called Preventing/Reducing Morning Sickness and Hyperemsis Gravidarum (herbs & more!)
http://www.mothering.com/discussions/showthread.php?t=618836
Good luck!