I just stumbled across this thread (was searching to see if anyone had compiled netcat)... thanks to those that did! I'm working on building a "carputer" to store in my trunk (GPS and WLAN, but not wardriving)... nc will help it integrate with the empeg.

Anyway, have you tried running two copies of netcat on the empeg? Have one listen on some port and pipe what it receives to another instance of nc that will send it out to the local broadcast?
#include <disclaimer.h> this may open security holes depending on your network setup.