Pretty unfortunate. I suspect we’ll see a hack to work around this soon – “So you just bought a Windows Mobile Treo with EV-DO service and you want to use it as a modem for your laptop? Forget it. Verizon Wireless says you must buy a second 3G subscription and they have the technology to back it up. Specifically, while the device, which has well-reviewed, comes with Bluetooth, Verizon has disabled the Bluetooth dial-up networking capability that would enable the Treo 700w to act as a modem for laptops.” Link.
Verizon Prevents Treo Use As 3G Modem