Sadly, yes he is. That bastard...
I also wrote an article for Sixfold Trial (actually a play - hope you enjoy!).
Rich and I have never collaborated on a module before and it was fun jamming with him on the concept for Sixfold (though the magic of the adventure itself, and believe me, its awesome - is all Rich!).
Rich and I are currently collaborating on [
http://www.sinisteradventures.com/dark-vistas]Ebon Shroud[/url] as well (scroll down past Razor Coast), which is available in a Pathfinder Compatible version.
You get PDFs of all versions, and you choose which print version you want when the books are ready to ship - OGL 3.5, Pathfinder Compatible, Savage Worlds, and possibly others.
If you preorder the book now you save $10 (the price goes up to $39.99 once it releases, its only $29.99 now as a pre-order special).
I can't wait to hear what you think of Sixfold Trial too! Hope it works out like awesome-sauce for ya!
Nick