Using a cell phone won't harm you, according to a draft report issued on Friday by the US Department of Health and Human Services' National Toxicology Program.

From the LA Times:

"The reports don't go much further than what we had reported earlier, and I have not changed the way I use a cellphone," NTP senior scientist John Bucher said in a briefing. Dr. Otis Brawley, the chief medical and scientific officer for the American Cancer Society, said that the new evidence should not alarm wireless phone users. "The evidence for an association between cellphones and cancer is weak, and so far, we have not seen a higher cancer risk in people," Brawley said in a statement.

Interestingly, rats exposed to the radiation lived longer than control group rats.

LA Times:

The researchers also reported that rats and mice exposed to radiofrequency radiation developed more tumors in the brain, prostate, liver, pancreas, pituitary gland and adrenal gland. But they said they weren't sure whether the radiation was responsible. Among non-cancer risks, rat pups had lower birth weights when their mothers were exposed to high levels of radiation during pregnancy and while they were nursing. However, the rats ultimately grew to normal size. Strikingly, the rats exposed to radiation lived longer than rats in an unexposed group that served as controls. The researchers were at a loss to explain this. Perhaps the radiation reduces inflammation, as is seen in a therapy called microwave diathermy, they said. Or it could just be chance. "It's a complicated situation here," Bucher said in the briefing. "We're seeing both positive and negative effects in these animals."

From Dr. Brawley's statement: