One thought that I've had would be to be able to set up flamp to
respond to DTMF. A message gets placed flamp and then other
stations can retrieve the message by using a fldigi DTMF macro.
That then triggers the station holding the message to transmit it.
Unlike ARQ store/forward this would permit multiple parties to
receive the message at the same time.
This is a similar process by which simplex repeaters can accept
and then relay messages. With my Argent simplex repeater I can
store a message using flmsg or flamp and then another station can
retrieve it with the appropriate DTMF command. Generally this
would be done on VHF using the DTMF buttons on the mic.
73, Steve KB1TCE