I have found out since I wrote the piece that ATT offers a data only plan for Blackberry phones but costs $60. That defeats the purpose if one is to have multiple cellphones. A data-only with optional voice usage or a small voice package is invaluable but should cost little so the general population would want to have multiple cellphones. One cellphone with current plans is too expensive as is and the need for multiple cellphones will not be met with expensive plans. I think the final outcome will be some carriers will specialize in such plans. Virgin mobile was bought out by Sprint and will lose its monthly plans soon. They offer only pre-paid and have a text-only plan for $20 or something. If that plan was $30 and had unlimited text, web and email with optional phone call, it would make a great deal of sense to pack a second phone on Virgin for that purpose. The fact that no contract is needed and nice phone with keyboard costs only about $100 would speed up the process. I think there is solid potential in this area and should be explored but also customized for professionals and those who need a second and third line without crazy costs or commitments. Those lines will serve many professionals and will stay around benefiting both the carriers and the customers.