> So now you can buy a radio chip for a few bucks and add it to any device.
Where?
> Think kilobits-per-second, not megabits-per-second.
Well, voice is (or was...) 32kbps, so technically you could make a voice call over these radios, if they can give you 32kbps? I've heard of voice compression as low as 8kbps too. Imagine a cellphone that lasts months :)