Just in case our long-running series of posts regarding the danger / safety of cellphone and WiFi radiation didn't tip you off, an FDA-commissioned study was just published by the National Research Council of the National Academies of Science that basically says we've got a lot left to learn about the effects of all those radio waves. The FDA wanted to know where to concentrate research efforts in order to better understand wireless safety, and it looks like there are quite a few gaps in the research: the study says there needs to be further study on the effects of wireless radiation on children, pregnant women, and fetuses, both long- and short-term, and that frequency and power differences between different types of radiation need to be better understood in order to apply current knowledge to new products. All in all, it looks like there's a lot we don't know -- but that's not going to stop us from rocking this Bluetooth headset while browsing and taking a call.