We're in a similar situation, traveling Aust in a van. I have a telstra next g home gateway modem, running off 12volts permanently connected in our van. It has connection to the laptop and the desktop computer, and one LAN lead also goes to an Ethernet phone I got of Ebay. That phone is set up through Pennytel, and also runs off 12V.
It does work quite well, and with no setup hassles, but working through the Next G wireless network usually gives a very noticeable delay to the message. Once the people you are calling get used to it, it works well, but at first it can be confusing with everyone talking at once.
The other problem is when the network is busy, and one side of the conversation drops out, usually the upload. This usually happens in more remote areas.
CU
Peter
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