BlackBerry 7250

I know Alltel and Verizon have strong roaming agreements for voice, but what about for BlackBerry email service? I understand carriers are reticent to do data-related roaming agreements, but I assume these two carriers would find such an agreement beneficial. I travel in both Alltel-dominated and Verizon-dominated service areas, and BlackBerry email service in both service areas is important to me.

Thanks!