The I-Sonic Entertainment System 2 is the latest iPod docking stereo from Polk Audio. The system offers room-filling sound and an HD Radio receiver with a special iTunes track purchase feature.
Using a technology called “iTunes Tagging”, you can flag songs that you’ve heard on HD Radio broadcasts and queue them up for purchase via the iTunes store. The integration automatically sends the list of tracks to the docked iPod, then iTunes will automatically mark them for purchase when you sync up with your computer. (Hopefully they’ll update this to work with the new iTunes Wi-Fi store on the iPhone and iPod Touch once that’s live too.)
The $499 I-Sonic ES2 will be available from retailers, including the Apple Store and PolkAudio.com starting this October.