Me too, i'm having problems with xbee and arduino due.
The example from the library works on all other boards (UNO, Mega... ) but not on arduino due.
I have this error when i do the compilation : "/arduino-1.5.2/libraries/SoftwareSerial/SoftwareSerial.cpp:41: fatal error: avr/interrupt.h: No such file or directory
apparently there is still no software serial library for the due but i don't know what to do to make my xbee work with arduino due.
I am waiting for your reply !!!
please help !
Best regards !!