Emon and Xbee communication


I think I have a simple question, but I am unable to solve it.

I am using the Emonlib from openergymonitor.org and i want to send the measurements with Xbees. I have 2 of this http://arduino.cc/en/Guide/ArduinoWirelessShieldS2. I cannot find a way to transfer this!! Is anyone able to help me plz???