When you say nationwide interenet what do you mean? Do you mean internet access via wireless/cellular providers like Sprint/Verizon/Cingular or a seperate dedicated service? I have "Vision" provide by Sprint PCS and a Treo 650. When I'm not using Vision on my Treo I can connect it via BT or USB and use as a modem. Is that sort of what you mean? I also suppose you mean for carPC applications. I rarely use a constant net connection in my car. It's rare that when I do want to connect with my carPC I can't find a 802.11 connection (free hotspots, or coarse

). I haven't tried it yet but I would like to use my Treo connected via BT for a constant 'net connection for GPS tracking. Just for fun.