Okay, so here's the setup. New Macbook. Two Airport Expresses iMac G4 (800mhz) For internet, my cable modem is connected to one of the airport expresses to send out a wireless signal for internet. My iMac, lacking an Airport card, is Ethernet-wired into the second Airport Express, and is receiving internet that way. However, on the G4, iTunes doesn't seem to have the option for listening to my music through remote speakers. Is there any reason for this not working, or does the iMac require a built-in card for Airtunes support?