Sometimes it's the little things: the audio out jack on the AirPort Express glows red when you start playing music and there are no speakers plugged in : r/apple
Default Password for AirPort Express and Extreme
Amazon.com: ShineBear Airport Express A1392 MC414LL/A 802.11n 600 Mbps 1- Port 10/100 Wireless Wi-Fi Router AirPlay WiFi for Apple - (Cable Length: EU) : Electronics
Apple AirPort Express Base Station (Summer 2012) review: Apple AirPort Express Base Station (Summer 2012) - CNET