I have a wireless internet connection for my home. There are numerous wireless (Wi-Fi) networks at several businesses near my home (Florida, USA) ... Panera Bread, Dunkin' Donuts, Krystal Hamburgers to name a few.

I found this when I investigated:
http://news.bbc.co.uk/1/hi/technology/6676129.stm
"The type of radiation emitted by radio waves (wi-fi), visible light, microwaves and mobile phones has been shown to raise the temperature of tissue at very high levels of exposure - called a thermal interaction - but there is no evidence that low levels cause damage.

The Health Protection Agency has said that sitting in a wi-fi hotspot for a year results in receiving the same dose of radio waves...

I have a wireless internet connection for my home. There are numerous wireless (Wi-Fi) networks at several businesses near my home (Florida, USA) ... Panera Bread, Dunkin' Donuts, Krystal Hamburgers to name a few.

I found this when I investigated:
http://news.bbc.co.uk/1/hi/technology/6676129.stm
"The type of radiation emitted by radio waves (wi-fi), visible light, microwaves and mobile phones has been shown to raise the temperature of tissue at very high levels of exposure - called a thermal interaction - but there is no evidence that low levels cause damage.

The Health Protection Agency has said that sitting in a wi-fi hotspot for a year results in receiving the same dose of radio waves as making a 20-minute mobile phone call."

So ... is there really that much danger? Don't talk on your cell phone a lot, don't put you lap top in your lap, and stay away from cell phone masts!