in this web : http://theiopage.blogspot.com.es/2011/10/connecting-mrf24wb0ma-to-arduino.html
the example shows that when you open google xhrome and put the 192.168.1.2 in the navigator, arduino sens you a web. In my case this web doesn't show.
the code is the next:
#ifdef USE_DIG8_INTR
// set digital pin 8 on Arduino
// as ZG interrupt pin
PCICR |= (1<<PCIE0);
PCMSK0 |= (1<<PCINT0);
#endif