Although, this is the wrong newsgroup...
http://www.microsoft.com/windows/windowsmedia/9series/server.aspx
Windows Media Services 9 Series, part of Windows Server 2003, is the
industry's most powerful streaming media server. Hosting companies
delivering audio and video content over the Internet can now offer their
customers Fast Streaming experiences, as well as full advertising support
and the capability to automatically program and seamlessly update digital
media content on the fly. Enterprises in business, education, and government
will benefit from the ability to effectively manage network resources while
delivering richer communications for executive broadcasts, online learning,
marketing and sales.