I asked in 2007 how does one change between different devices on Xohm w/o a SIM like authentication mechanism (say if you want to switch Xohm usage from NIT to home modem, or from laptop to wimax/evdo phone, etc.).

The authentication mechanism on 1st generation devices is apparently MAC based with a proprietary connection manager SW. So if you want to switch usage between two devices, you have to register both of them. Apparently, registration process is easy although you do pay more for the luxury of using two devices.