I very rarely, if ever, talk with the cell phone to my ear - I use the headset. Mostly it's because I'm either driving or crocheting, but also because the one we use doesn't have an extendable antena... and I remember watching something on 20/20 or Dateline years ago about a possible link to brain tumors. We don't use ours much period.
As for the laptop, I asked my doctor about it last pregnancy, and she said that it wasn't a problem. My husband is our resident computer geek, and I've had him explain it to me before - here's what I remember. The wireless network connection is a radio wave, and the screen part gives off radiation in the form of light and heat - but it's not the same kind as people were worried about from the desktop monitors. All in all, I'm not worried about it - but I don't keep it on my lap often (that's usually where ds is =) ).
I'm not saying don't research it - do whatever you need to feel more comfortable. But I'll pass along the same advice that I gave to another friend last week when we were talking about microwaves. She said she's not convinced that they're as safe as we've "been lead to believe" - and while ignorance is bliss, it can also be deadly. I said that's fine - just remember that EVERYTHING has some sorce that says it will kill you or give you cancer... from drinking herbal teas (or even water) to birthing outside a hospital =) Do what you feel makes you and your family healthy and safe - but don't drive yourself crazy