Napster on Monday announced that it had certified a new set of devices to work with the company's Napster To Go subscription based music service, including a new option for users of some Palm OS handhelds through third-party software.

Massachusetts company NormSoft on Monday introduced Pocket Tunes 3.1, which allows users to play files protected by the digital rights management in Windows Media version 10, code-named "Janus." Version 3.0 released in June 2004 first allowed Windows Media to be played on Palm devices.

Palm also appeared to throw its support behind the player. "This new version of Pocket Tunes Deluxe really opens the door for Palm product users to listen to their DRM-protected music on the go," senior marketing vice president at Palm Ken Wirt said.

As well as supporting Napster's service, the addition of Janus support means Palm users would also be able to take advantage of Real's Rhapsody and Yahoo's Music Unlimited service.

Devices compatible with the software include the Zire 31 and 72, plus the Tungsten C, T, T2, T3, T5, and E2 models.

Along with these Palm devices, Napster also certified the use of the Rio Carbon and ce2100 an the Samsung YH-925 and YH-820 for use with the service.

"Palm, Rio and Samsung are manufacturers at the forefront of the exploding portable media device marketplace and we are very pleased that Napster To Go members will now have a wider array of cutting edge devices to choose from," said Chris Gorog, Napster's chairman and CEO.

Currently over 25 devices are compatible with the subscription music service, according to Napster.