Two new electronics devices have been announced that will allow HD Radio listeners to "tag" songs they like and then purchase and download those songs via the Apple iTunes music store. The devices, from Polk Audio and JBL, make use of Apple's iTunes tagging technology and will work with songs played on both primary and HD2 multicasts.

Polk Audio is introducing the I-Sonic Entertainment System 2, while JBL is launching the iHD. Both are compact desktop systems that feature HD Radio and an iPod dock with iTunes Tagging technology.

Here's how it works: The iTunes Tag button on each device allows consumers to tag songs broadcast by HD Radio stations. Each device then stores information about the tagged songs to its memory and transfers the tags to an iPod when docked. When the consumer connects the iPod to his/her computer, iTunes automatically presents the songs in a new Tagged play-list for the consumer to preview, buy and download.

Following on the heels of the announcements by Polk Audio and JBL, Clear Channel Radio said it will offer HD digital radio broadcasts for devices supporting Apple's implementation of the HD digital radio tagging feature. Clear Channel also said it is urging all radio broadcasters to fully support the new capability.

Clear Channel Radio president and CEO John Hogan commented, "Apple has been a strong supporter of radio, previously making an FM tuner available for the iPod, and we view their support of HD digital radio as an enormous opportunity. All of our FM stations broadcasting in HD digital radio will be available on these important and unprecedented devices. With substantial gains in online and on-demand programming already under our belt, there should now be no doubt of radio's ability to constantly evolve and embrace new technology. The iPod is not a competitor to radio - it is a collaborator in connecting with consumers on a continual basis."

The I-Sonic ES2 will be available from select specialty retail stores, Apple stores and direct from in October 2007 for $499. No word yet on the cost and availability of the iHD.