This looks like quite clever hardware, but there’s no way I’d buy a Microsoft-based phone after my own experiences with the iPaq and, more importantly, seeing a friend’s constant frustration with his SPV – a phone which would regularly do such things as ring and then deny you the ability to answer the incoming call, and which would need regular rebooting.
I mean, come on – pick one big software company in the world that you would least like to trust your personal communications to..