Last year around this time there was some renewed concern that cell phone radiation could be dangerous, especially to kids. The Environmental Working Group has brought up the subject again with their release of the best and worst phones for radiation emissions and bringing up their concerns of the possible dangers. But there still does not seem to be any scientific evidence that they are dangerous and non-ionizing radiation is not known to be dangerous to the human body at the levels one would experience in everyday use of cell phones.
It is interesting that Samsung dominated the top 10 best phones list with 5 out of the 10 that have the lowest emission levels with the Samsung Impression taking the top spot. Motorola seems to dominate the top 10 list of the the worst rated phones with 5 out of 10 on that list (they do have one in the top ten best list also so it seems to be phone specific).
As I said in my entry last year, the FCC does limit the radiation levels of cell phones to a maximum specific absorption rate (SAR) of 1.6 W/kg (European limits are 2.0 W/kg). You can find the measured SAR values for many cell phones on CNET's website (one of my favorite sites for Tech Info.).