Here are a bunch of covert induction rigs. Most have earbuds that, like band-aids, come in “fleshtone” (ie, pinky-white or light tan). I really thought companies would be smarter than that now.
http://www.perolas.net/HIDDEN-COVERT-SMALLEST-BLUETOOTH,i300242696083,c80077.html
http://www.spylife.com/MicroEar.html
http://www.microelec.com/ear.htm
http://www.swatheadsets.com/surv_headsets/phonak/phonak.html