My WiFi routers don't have power switches, but they both support turning off the WAP radio - I'll have to get one of those kill-a-watts one day to measure the difference.

While I need the router active practically 24/7 (so my PVR/server can access the net to schedule updates and downloads), I don't need the wireless radio on all the time. Neither of my products has the ability to schedule on/off for the radio though.

Without WiFi, the SqueezeBox will have to be wired via ethernet, so that's something to keep in mind.

Mine's using wireless even though it's within 2 feet of the WAP.