Actually the only person I really heard talking about it was you. It was like a new form of of auto-immune disease but have not heard anything about it since you started a thread on it.
I think it is a systemic disorder and not necessarily connected to J Pouches. It is an autoimmune disorder, not a J Pouch issue per se. AS is also an autoimmune disorder but you don't read much about it here. AS manifests in areas outside of the GI tract.