Niran has a new version of the Black Dragon Viewer out: 2.4.2. You can read the announcement and downloads can be found here. Some of the changes are:
Multi-line chat – this lets you see multiple lines of chat as you type. It is an option you can turn on and off in Black Dragon Viewer.
More work has been done on Volumetric Lighting, aka GodRays.
The Hover Height feature the Lab is adding to their viewer is in Black Dragon Viewer now. This is the right-click on avatar version of Height Control. Select Hover Height and adjust.
There are number of other fixes.
Niran was interviewed on Drax’s Radio Hour.