Had blackberrys now for about 4 years. Fantastic phones ! Phone, text, email, internet and so much more at your fingertips.
I have my work emails directed to my phone and can access my website on the job if I need to.
Not to mention the bb messenger.
Oh and the facebook & twitter applications if you run your business through them.
They do so much more. I looked at the iPhone and a few other touch screen phones (yes RIM do one too) and decided against as they are easily broken screen wise. I have a curve 8900 at the moment, but will be upgrading to a bold soon I think.
My wife and I were the only people we knew 4 years ago that owned a blackberry. At present I have around 50 people on my messenger list that I am able to contact instantly
Oh and I'm typing from my berry via wi-fi