I ordered an R4 from dealextreme on the 2nd, left Hong Kong on the 17th (slow shipping, but it's free, so whatever), arrived in Boston today (23rd). It is dark gray (not quite as black as the DS, but still plenty dark).
You probably get more "radiation" from your local power lines than you do from an internet hub.
Remember that it's just radio that you're fearing.
If you really think it's a health issue, why not talk to a doctor?