So is there a specific technical reason why it is not feasible to support all 3g bands? Antenna technology, baseband processors not existing, IP & patent concerns?

And if the issue is one of a chipset, would there be a specific chipset for various band groupings...like the AWS/Euro bands versus the Americas/Australia bands? Is it one chipset programmed via firmware? Why isn't this hackable dammit!?!? I want an N900 and I want coverage. So a switch to Tmobile USA is a non-starter here....