Is their a way that I can stream a saved flv to connected users and user login
in after the stream broadcast has started they will join in at the stream point?

edsiii@fuse.net or edsiii@sprintmail.com

Yes.

On the server side, you can start a stream, and then publish a prerecorded flv
to that stream. Then, your playback application will subscribe to the stream as
a live stream, rather than calling on the .flv as a recorded stream.