Hello all, I read this thread with heavy interest, thanks for all the valuable postings. I want to mention recourses which may be of help:
http://www.doctor-natasha.com/ The book was already mentioned here. This book describes very detailed the leaky gut phenomenon. It is the most detailed book on that matter I came across. Also it provides a detailed strategy to heal the leaky gut including recepies (e.g. meat stock/ bone broth). It was written for ADHD, dyslexiia and autism sufferers but if we follow the argumentation here that this is applicable for CFS/ME too there are many valuable explanations in it. For example why stomach acid is usually low, which brobiotics to take, why meat stock is so healthy (inc. recepies), what to avoid, which medication is recommended (not much), why leaky gut has severe consequences on brain+ allergies and immune system, why vegetarism might not work when having leaky gut. And most important she claims to have helped many patients, so it seems her recommended strategy really helps, but I have to warn you it is very detailed, time consuming, long (at least 2 years) and strict.
Since Palaeo was mentioned here also, which is similar to GAPS here is a quick comparison
http://www.phoenixhelix.com/2013/01/18/comparison-of-3-healing-diets/
Also there is a more strict regime of Palaeo for autoimmun disorders
http://autoimmune-paleo.com/
Two years ago I was on heavy Palaeo/GAPS without having known the books just because I could not tolerate vegetables (firbres, allergies) and I avoided any carbs (esp. gluten) due to allergies and intolerance. I had significant success with my ADHS symptoms and belly problems. At that time I also had a light CFS/ME issue which was slightly improved but was cured by something esle (fixing my jaw problems). Unfortunately now i am back to gut problems so I try to implement the diet again.
By the way since L-glutamine was mentioned here for gut cure. According to Amy Yasko people with neorological inflamation shall not take it because it increases glutamate levels. I know one at least one woman in a german forum who has severe CFS/ME who can not tolerate any L-glutamin.