How much does the Motorola Droid cost per month?

There is a possibility that I will be getting the Motorola Droid very soon. So, I was wondering about how much it will cost each month? I know that you have to pay for internet, and I heard that it costs $30 a month. Is this true? We have the family plan with unlimited texting and 1,400 free minutes each month with free nights and weekends, if it matters.|||It will be an extra $30/month for the data plan. You can continue to share voice minutes and texts.|||just add 30 more on top of your bill for each smartphone. So if you have the america choice 450 that is 40 a month than will data will be 70 plus tax. This is without text, but you do get free nav.