CNET has a very useful guide on their site showing how much RF energy your body absorbs from specific cell phone models when held up to your ear. While my phone (the now practically ancient Treo 700p) isn’t in the top 10, it’s still way up there with a 1.48W/kg SAR rating. SAR = Specific Absorption Rate.
Note to self – get a Bluetooth headset pronto. BTW, if you live in California, you have 2 weeks, before the “hands-free” law goes into effect banning driving and talking on a cell phone using your hand.