We've had this discussion before, it's difficult to change someone's belief over something concerning their health and anything that hasn't been 100% ruled out like wireless radiation. Perhaps it's the term 'radiation' (to some it means 'Chernobyl' but all it means is 'spreading out').
I'm still going to make my point: if you live anywhere remotely near a built up area, including suburbia, you'll be exposed to so many other forms of EM. Everything that uses electricity gives of EM, the transformer for your house power, your car, radio, phones, speakers, microwaves. You'll have to move to a remote farmhouse, literally. Bluetooth is ULTRA low voltage, mobile phone towers from a few miles away probably have more power at that range than a BT mouse.
But in any case: Apple gives you the choice: wireless KB/Mouse, or wired KB/Mouse. You don't want the bluetooth ones, so you're left with only one option, what is there to discuss?
(The Mighty Mouse sucks btw).