Music Gremlin player retails for $300.

The Music Gremlin wireless music player and service is now live, available for sale via Amazon.com and the company’s own Web site. Music Gremlin is a portable MP3 player that connects directly to it’s own online music store via public WiFi Internet connections. No PC connection is needed.

The service offers unlimited, on-demand music and commercial-free programming on a monthly subscription payment model. Users also can by individual tracks or full albums on an ala carte basis. MusicNet is powering the music store.

The subscription service costs $15 a month, with individual tracks at 99 cents each. The Music Gremlin player retails for $300, and comes with an 8 GB hard drive, headphones, power charger and USB cable.