Yeah that's a good point I've got a module which uses http://www.silabs.com/products/wireless/EZRadioPRO/Pages/si4...

The chip itself covers 119–1050 MHz, but the modules I have, have filters on to allow only narrower ranges.

I got excited there for a second, I thought you linked the Si468x, which I have been thinking about tinkering around with. It is just a receiver, but it does HD radio which interests me for some reason (it certainly isn't the audio quality :))