Now, apparently, he has some sort of blog post where he's talking about workflow from Hammer to XSI Mod Tool to SketchUp to Hammer (?!) and it looks like some sort of sequel to Mistake of Pythagoras. The machine translation of the page doesn't provide much more insight, it sounds more like he's lamenting that everyone's ditching the Source mod scene for UDK and Unity. Am I reading correctly?
(Thanks to @Orihaus for the info)