Rush will interest both intermediate and power users; the Graphic User Interface allows simple management of distributed rendering, while technically savvy power users can exploit the command line interface by creating 'wrapper scripts' or custom guis to dovetail rush into existing production pipelines.
Rush supports both unix (irix, linux, MacOSX) and Windows (NT/2K/XP), and can manage jobs across all platforms. Single and multi-platform Rush installations have been used in production. Rush has been used on networks as large as 500 machines.
There is full documentation on the rush command line , or to get a feel for the command line, browse the short tutorial , or look at the docs for the web page GUI and the screen shots for the new C++ IRUSH GUI .
Currently running on IRIX, Linux, Dec Unix, Windows NT. It is commercially available.
Here's a WinNT DOS screenshot showing Rush managing BMRT renders with a DOS batch render script. Customers have also used Rush with Houdini, Maya, Softimage, Chalice and others.
Targeted towards power users, the system can be entirely controlled from the command line, so that custom scripts and GUIs can easily interact with the system, and so users can control/monitor renders remotely, even over simple tty terminals.
Also, the companion web page GUI allows control of the system for people that aren't used to the command line.