Thanks for all of the great responses...I guess I didn't say in my original post, but I have a Blackberry for work (that I use for personal as well) and my DH also has a Blackberry. It is nice because I use it for my calendar, address book, etc. but it's also annoying to get emails on it because it makes everything feel so urgent.
I really like what several of you have said about the fact that owning a cell phone is not what is bad, it's how you use it. My family is cell phone obsessed. We are all in business together and everyone has Blackberrys. We have a business that kind of requires someone to be able to be reached at all times, which drives me insane, because if you don't answer, it might be something REALLY important, and then the world would end.
It's like we've lost the ability to determine when it's time to work and when it's not. Blackberrys, more than other phones, allow you to have your work "on your hip" at all times. Today, on a Saturday, my mom was intently reading a work related email while we were hanging out. It makes me crazy.
Just be where you are, right then. Don't talk to someone else for 1/2 hour when you're sitting in the presence of another person. Am I the only one who thinks this is annoying?