If you use Squeezebox etc, you can write a script to take output of RS232 and display it on your squeezebox display.
Many years ago, I had a small windows program that I modified to display a test feed from the serial output from my GPS on my Squeezebox, but never was in a position to have my PC close enough to my M kit to do same and optimise the output from my M kit. In the mean time, Slim broke the web API that I was using and it was only in the last few years that I received notification from them that it had been fixed, by which time, I had moved on.
There seem to be very many more api's available for squeezebox now and I don't think it would take much for someone to utilise one of these write a script that would (simply read comms port, format, write SB display, pause as required) do this now if one has not been written already. Thankfully the serial output of the newer M products is quite display friendly. I would, but have long ditched squeezebox and some people seem to have far too much time on their hands...
