What to do about Blackberry-addicted friend?

My friend got a Blackberry about six months ago. She is addicted to it! Even if we go out to eat, she's got it and checks it, and sends messages on it mid-conversation. It's so annoying. The funny thing is, she's a stay at home mom. It's not like she's got some big corporate job or something. I'm a stay at home mom too and our kids are with us most of the time ,so i don't see the big urgency that she has. I've actually been hanging out with her a little less cause i think she's being rude. Should I say something? I just can't imagine what I would say that wouldn't offend her. Should I just deal with the rudeness?