His Sublimeness seems to have slipped off the radar. I know he's been in poor health, just wondered what's new. On a related note, absolutely no signs of Kai anywhere online.
Otto appears now and then like a spectral Being. I last saw him lurking not that long ago. In and out only to be glimpsed. I believe he not only maintains this site but is also raising a family and apparently has a Day job.
I talked to him a couple of weeks ago. All of the above apply, as well some significant health issues with others in his family. As you may have surmised, he has a great numbers of plates spinning in the air right now. Actual video of him right now. Eric Brenn "Plate Spinning" on The Ed Sullivan Show (youtube.com I am in a similar position, though with not as many serving pieces involved.