> Is iTunes set to 'look for remote speakers'? (iTunes Preferences->Audio) I > assume that the 'enable AirTunes on this base station' option was checked > during initial setup of the base station? You can confirm this using the > Airport Admin Utility (select the appropriate base station and view the > current settings in the Music tab). If this is all in order, then I guess > there might be a problem with the hardware involved. Yep, looks like something's up with the hardware. I downloaded a Firmware update, but I can't see the Express from either Mac. Apple's Air Express forum is chock full of people with similar weird problems.