I reccomend all webmasters to try the demo of Darwin streaming server - It can be downloaded from
http://developer.apple.com/darwin/projects/streaming/
and it runs on:
Mac OS X, v10.1.3 and later (server and proxy)
Red Hat Linux 7.x (server and proxy)
Solaris 8 (server and proxy)
Windows NT Server/Windows 2000 Server (server)