Allegro Portable Internet Radio
The Grace Allegro Wi-Fi internet radio can run for about 8 hours on six AA batteries and streams over 16,000 radio stations from the likes of Pandora, Sirius and Live365. Is has built in 802.11b/g/n support and even has an iPhone remote control app so you can change stations without walking up to the unit.
You also get MP3/WMA/Real Audio/WAV/AAC/AIFF codec support, alarm functions, built-in speaker, 4-line display, standard remote control.
The unit will cost you $170 and is available right now from Grace Digital Audio