Well because my iBook logic board I'm using a PC right now, but I doubt it would be different for either system. I have a two computer home network at home including a wireless router. My iBook was connected with an airport card. The replacement PC however is using a USB adapter that I bought (it's some no name brand too.) Looking at the manual, I notice there's a page explaining how this devices causes RF (radio-frequency) radiation. Although it's never been proven to actually cause cancer, in general people are suggested to limit themselves to exposure of RF radiation. What I'm wondering is, and hopefully someone could help me out here: a) would replacing the USB link with an inside-the-case adapter card hopeflly limit my exposure? b) do you think that the cheaper brand would be more likely to have more RF radiation and that companies such as D-Link might make products with better RF management? c) to limit my exposure, is the ideal signal (while being only one floor up nearly directly over the ruter) a weak signal or a strong signal? Thanks alot.