Apart from the IBOC specification itself, this is the closest thing to an IBOC Bible that you will find. Checkout digicomparison's Digital Radio page for more detailed reading about various digital radio systems, including HD Radio.
When comparing internet retailers, remember to include the cost of delivery in your calculations.
Retailers with low headline prices can often have higher delivery charges. Price comparison websites usually list the lowest headline price first, but the best deal may be lower down the list.
Microsoft
No description is really necessary, is it?
Watch supported 720p HD movies, TV shows, and videos in high definition on your HDTV
Send music to your home audio system
Charge your Zune HD player while docked
Remote Control
Allows syncing of supported HD videos
The missing link between your Zune HD Radio and your existing analogue FM car radio.
This device searches for the best available FM frequency and retransmits the signal so that it can be received by the car radio. For better audio quality, the device also has an AUX Out that can be connected to an AUX in if that exists on the head unit.
United States
Batteries
Batteries frequently encountered in HD Radio receivers and their Remote Controls.
Used in many remote controls
Some receivers that incorporate a clock use this battery to keep the clock going when the radio is not switched on or plugged in to the mains.
The Sony version is shown as a representative example, but this type of battery is available from many different manufacturers.
United States
I'd be grateful to receive information about other accessories.