AT&T Offers a $20 Unlimited Text Message plan for the BB that you can add to their voice plans. Go to
Cell Phones and cell phone plans - | Wireless from AT&T, formerly Cingular and go to Shop>Phone Plans to see the voice plan costs. The advantage of AT&T is that if you find yourself needing to access the web or use GPS Mapping once in a while you are charged on their Pay Per Use MediaNet plan. This is what I use and am very happy with it.