If you are looking for an inexpensive way to stream Flash video over the web without purchasing the expensive Adobe Flash Media Server, then you need to check out the Wowza server which allows you to stream up to HD quality flash video on the web.  Wowza is an alternative to Flash Media Server.  You can download a free 10 user license or even fire up a virtual Wowza server through Amazon Elastic Cloud service.  Wowza supports some great features like chat, interactivity, server side recording, and live streaming.  Use it to stream RTMP and RTSP.