A headless client with simple fifo audio input/output would allow bridging mumble to other services like asterisk/sip without running an X server
I support this. It would also allow the creation of audio "bots" to do various fun things for servers used as a social hangout.
Had planned to set up a few raspberrys to feed me sounds from around the house.
I prefer playing with headphones but still want to hear if something else require my attention.