BEM, MIB . . . or WLAN?

Either the Aliens are trying to send me messages over my stereo, my wife's computer speakers, and occasionally the little iPod speakers on my elliptical machine . . . or the Secret Agents are beaming coded signals from that van out front, but my Treadstone conditioning has failed. Or maybe -- I know, this sounds crazy -- all of these devices are somehow picking up garbage from my wireless network.

Has anybody ever heard of an 802.11g access point causing audible artifacts on random speakers around the house? I swear, it's freaky.

And if it isn't that . . .