It is pretty snappy on a monster machine, it is not nearly so snappy on a smaller machine. The complete release notes are available here . They are documented here . Lighting is broken for points and lines. I figured out how to do it and its between models at the moment.
More documentation is available.
I'm probably going to work on the model documentation. A couple of new tests, cameratest and perspective that I wrote while figuring out cameras. The elements are there, all I need is to get them together into a coherent package. Things to do and see. The source is available as either a zip file or as a gzipped tarball.