I recently bought a bluetooth A2DP stereo adapter. It's pretty neat. wish it used a standard mini-usb charging plug but I understand why it doesnt. Also it'd be nice if it had a caller ID display screen in a similar way as beepers used to along the edge, but I paid $15 bucks for it so who am I to complain. It works with my phone and ubuntu, so that's cool.
The point of this post though is to point out the distance you can take a bluetooth headset from the source. about 3 meters. Just out of reach of my bathroom. Sadness.