Before you all whip yourselves into a frenzy, consider this.
Internationally recognized safety standards for long term exposure to microwave radiation start to raise concerns around the 100mW power level. Certainly, placing a 600mW cell phone directly against your head in service for long periods of time qualifies as a potential risk in my book.
Many folks feel safer with wired headsets because of the increased distance they can hold the phone from their head while talking. This has two problems: A) Wire conducts RF energy. Even the best impedance matched coaxial cable exhibits losses over distance. While there are considerable losses along the path of a headset wire because it is not impedance matched, there may still be as much as 5-10% of the original injected signal radiated at the far end. That's 30-60mW. Still too much. B) In states such as mine that require the use of "hands free devices" while driving, it baffles me how they can classify wired headsets as hands free. Have you ever seen how much more attention it requires of the driver to keep from getting tangled in those damn wires? How much safer can that possibly be? Answer: It's not. More people probably die from distracted driving as a result of the wires than they otherwise would if they were just allowed to hold the phone.
Contrast this to BT headsets. Phone stays in your pocket or on the dash. Calls can be originated and canceled without touching or looking at the phone. The intermittent microwave power level exposure is measured on a scale 1/1000 of a standard cell phone. While not in a call the device emits it's tiny power in infrequent bursts just to make sure it's still paired with the phone. If you're still concerned, take it off between calls. They don easily enough.
And if none of this has in any way changed your paranoia of BT headsets, you should just throw the phone away and be done with it, crawl into a lead lined bunker stocked with only organically grown foods to last the rest of your life and exist until you die.
I prefer to live.