Preface: I've searched and searched and can't seem to find a precise, working explanation for my problem... I'd think my set-up would be common, but apparently not. If this has been discussed before and I missed, feel free to redirect me to the appropriate thread. My problem: I can't detect my new AirPort Express (N) with my new iMac, unless I plug it into my iMac's ethernet port OR reset it and choose to connect to it's "network". Neither of these options would provide me any value. My setup: 1. Broadband cable modem --> into Ethernet port on my iMac (24" Aluminum C2D 2.8 GHz, April 2008 model) 2. using iMac's internal AirPort Extreme & internet sharing (upstairs) --> connect wirelessly to old G3 iMac with internal original (i.e. slow) AirPort card installed (downstairs) That setup works. What I'd like to do: Add my new AirPort Express to "the network" to... 1. AT MINIMUM stream iTunes via AirTunes from my (upstairs, 24" iMac) to my stereo (downstairs). 2. AT BEST... use the AirPort Express to do the above (share iTunes from 24" iMac w/stereo) AND give my (downstairs) G3 iMac "virtual-N"-speed internet connection, via the AirPort Express's ethernet port. I think this is called an "ethernet bridge", and I've read it is possible but not well-documented, with the AirPort Expresss. NOTE: If point 2 is not possible, I want to be able to do point 1 (AirTunes), but still be able to connect my G3 iMac to the internet via its internal original AirPort card. Also, I'd like to keep my 24" iMac directly connected to the internet via ethernet cable for the fastest possible connection. [begin rant/] I've tried to get this stupid AX setup for hours now, and am starting to regret this purchase! Maybe I'm just a moron, but I can't seem to accomplish point 2 above, or even point 1. I should at least be able to stream AirTunes, right? Or is my internal AirPort Extreme card on my 24" iMac too inept to do two things at once? Do I really need to buy an AirPort Extreme base station to get everyone talking to each other??? Is that how gets folks who really shouldn't need one of those to buy one? Maybe I'm jumping the gun here, but I have no problem plugging my ethernet into my iMac directly and sharing the connection via the internal AirPort. Why should I have to buy a dedicated wireless router (i.e. AirPort Extreme base station) just to get an AX working with AirTunes? Ugh. Also, I'm really getting sick of having to keep rebooting my iMac. When changing my internet sharing preferences (i.e. disabling it so I can try and connect with the AX's "network"), I keep getting my AirPort stuck in "Off" mode, and won't turn back "On" unless I restart. You can click the button to turn on AirPort all day long and nothing happens. I thought AX was supposed to be idiot-proof. It is marketed as such. I realize the ethernet-bridging isn't an advertised feature (so I shouldn't expect much), but at the minimum, getting AirTunes up-and-running should be idiot-proof. [/end rant] One more thing: My 24" iMac is running OS X 10.5.5 and whatever version of AirPort Utility/firmware that was included with the AirPort Express. I used the AX's install disc, and then ran Software Update, and it found no new updates. Also, I'm using iTunes 8, most recent update. My iMac G3, for what its worth is running OS X 10.3.9, but that should be superfluous, right? I'm not trying to setup the AX or stream AirTunes from the G3. Thanks in advance for any advice!