XM/Sirius satellite radio doesn't offer coverage in anyplace but North America.
I'm currently building my own CarPC and got interested in XM radio. Do I need to install an external radio receiver or can I connect some kind of antenna device (like with GPS) directly to a USB port? Thus receiving in the software way. And I assume I need a subscription of some sorts.
Can anyone give me some pointers, I would appreciate it very much.