This is what I've been interested in lately...
Animal Pharm: How To Cure SIBO, Small Intestinal Bowel Overgrowth: Dr. BG's 7-Steps Paleo* Gastro IQ SIBO Protocol
Poke through this blog and the Resistant Starch thread in the Nutrition subforum.
I took the breath test, but I think I did it wrong, so it came back negative. I'm chronically constipated without ridiculous supplementation and I'm still somewhat convinced it's SIBO.
How long are you supposed to be on the Flagyl?