I had hoped to set an adventure at some point to flesh the area out more, but so far nothing came out of it. It has been mentioned off and on in a number of adventures (such as the Tournament), and I've had Sairundani appear in my self-made adventures Dance of Soul and Slaves of the Dragon in minor to background-only roles (For example the owner of the "Scimitar" in Dance of Souls). You are, as I see, familiar with the background for the Hurakan. What else...
I might point out again that the ai/yn [TribeName] honorific means hero of that tribe. A hero isn't necessarily a patriarch or vice versa.
The patriarch of the Sirocco, Harmattan, does have the ai Sirocco honorific, and is probably the oldest patriarch and the patriarch who has been ruling his tribe the longest of the current patriarchs (or other rulers of the tribes). In my mind, he is a LN high level fighter who is by now of venerable age (and has suffered the appropriate ability score changes).
The background for the Hurakan as developed by shadowbloodmoon made them a bit more traditional and "stable" than I would have made them, which is probably a good thing.