Hi Jamie,
Solid Angle: “We are currently working on a Cinema4D and Katana plug-in as well with release dates still to be announced.”
Perhaps you go to the website https://www.solidangle.com/news/press-release-c4dtoa/ Perhaps you contact Barbara Marshall, perhaps they have a new letter even…
I guess that Mike Seymour (FXPHD) will certainly extent his nice articles about rendering tech, if there is something essentially new to report http://www.fxguide.com
At FXPHD Matt Leonard has a course about Arnold, ... for Maya, but perhaps it helps. (I had several course from Mike and Matt, hence why I suggest it here.)
... or check periodically at MAXOn itself: http://www.maxon.net/nc/en/home/search.html
In hope you get the information that you seek soon.
All the best