I've heard of a kingdom that role-played pirates, so I think there's some interest. The problem is if any of them see the forum. My mission keeps me from pursuing ideal kingdom culture: I travel/kingdom-hop to help kingdoms who need help due to exodus, civil war or closing shop on a dissolving kingdom.
I'd like to get more involved in helping fragmented kingdoms find other with which to merge. If I run across any I'll happily aim them your way. I'm an old D&D guy myself with over 30 years of roleplaying.
You might check out SPGC as they have a number of fun loving types on irc and I think they have something called " sillspeak ". They may have knowledge of such kingdoms since SPGC is a commutative of several kingdoms from Jerk, AC, WSK and I'm sure a few more.