I'm working on a PF splat.
Yeah, I one of those brand new 3pp's working on a setting, adventure arcs and rules splat for Pathfinder.
Initially I was just creating a simple ruleset add-on for my Japanese dark fantasy setting and adventures for Kaidan. Upon a little research, I discovered that neither Oriental Adventures nor d20 Rokugan was OGC, so I couldn't reference those rulesets for my setting. After a verified Email with Jason Buhlman, I now realize I'd have to develop my complete Japanese flavored ruleset.
In a couple weeks I'll be release my initial adventure arc for the Kaidan setting called "The Gift", then two more adventures to complete the adventure arc. Then sometime in the fall I will be publishing the Splat book - Kaidan RPG with rules for variant samurai, ninja's and monks, martial arts combat, use of psionics in that setting, its own beastiary, plus some mechanics specifically for use in the Kaidan setting, as opposed to other oriental based games using the same rules.
Plus I'm a pro cartographer for a couple of other 3pps doing Pathfinder material, one at least is working on a Splat book of sorts, but being there's an NDA, I can't talk about it!
GP
PS: my setting is both Eastern and "like Ravenloft"!