Satellite radio is dead. The world's first internet car radio, from Blaupunkt and miRoamer delivers thousands of internet stations integrated with a standard AM/FM/CD dash console worthy of KITT.
All of your preferences, providers and searches are customized on miRoamer's site, and you can instantly flip back and forth between internet or terrestrial radio stations in the console. The secret sauce is 3G GSM. Since it's just a plug-n-play SIM, it theoretically means you could get the Australia-based service working in the States on AT&T, once it goes from being built-in equipment to a setup you can buy separately.