After having read Mr_Burrows nice threadI sort of stole an idea worth its own thread:
Couple radio range with the chat!
Anyone dead or out of radio range? You won't read them or see their pings.
Maybe even allow for intensity changes - like stronger signals from people near you and going to the edge of radio range it fades off.
That would also allow for better communication of the battlefield with the standard shortcuts.
Any ideas about this? ^.^