Years ago, I remember a write up of a version of the ancient Baatorians. The race was named the "Ilshari", and they had psionic abilities, organized into gestalt entities, and had some relationship to the illithid and Ilsenine. Like most of the planar races, it was organized into caste "sub-races". It was loosely inspired by the more or less mature tentacled nupperibo (not converted to a lemure by the baatezu) described, I think, in Planes of Law.
Anyone remember this, or have the write up? I used to have it, but lost it, can't seem to find it online.