I am now confirming the following platforms for our beta2 release:
- Windows 32bit with Cuda 3.0
- Windows 64bit with Cuda 3.0
- Mac OS X 10.5 (Leopard) and 10.6 (Snow Leopard) with Cuda 3.0 (Requires Nvidia Card)
- Linux 64bit with Cuda 3.0
I can render a model with 7 million polygons with the 64bit version.

The current ETA for the release is early next week.
It will also support the new GTX400/Fermi cards, according to the Cuda 3.0 documentation.
Radiance