QuickTime Streaming Server 4 Public Preview 2

is available for download. According to the ReadMe file, "This is a trial, pre-release, time-limited software release of QuickTime Streaming Server meant for evaluation and development purposes only. This software should not be used in a commercial operating environment or with important data. You should back up all of your data before installing QuickTime Streaming Server 4 Public Preview 2, as well as regularly back up all of your data while using this software. This software expires on March 15, 2002. Restart your machine if you did not install BSD packages when you installed Mac OS X Server."