Thud, fasting discussions have been going on in the Dr Fung thread, started in 2014, under the Diabetes sub-forum. Journals are another place to discuss any type of fasting you like. A separate board would be great, and the Fung thread could be moved to it as a start, but moderators are rightly cautious about people taking it to the extreme. The "if 36 hours is good, 36 days would be better" types.

Imo, the best source for solid fasting advice based on Dr Fung's protocols is his FB page. https://m.facebook.com/groups/obesitycodenetwork/
The Files for that page have extensive information and answers for every question ever asked about every style of fasting, and dozens of sample week templates from trained moderators. Facebook also has dozens of crazy unsafe fasting groups, snake diet anyone?, but the OCN is medical based. The IDM website is also a great resource, and his four books.