I have a document outlining several worlds in the Markayn Marches I'd be happy to share, now that Green Knight has started on it. It's written from the perspective of an Imperial Navy officer briefing on the strategic importance of the worlds (I was going to use it for a BFG campaign), but has a variety of socio-political commentary in there too.
Definitely interested. When doing the world descriptions I try to look around on the webways first, to see if there are any fanmade interpretations already made. If so I try to incorporate them into the gazetteer.