The other, for $14.99 a month, will allow you to pick 100 channels, with Sirius customers able to select from a company-determined ‘best of’ XM’s channels, and XM customers allowed to select ...

The XM + Napster service is available at a new Web site, to be marketed by both companies. Music downloaded from the service can be played on portable MP3 players available now, the companies said.

Financially struggling Sirius XM Radio Inc. is planning to stream its subscription radio service to the iPhone and iPod Touch devices from Apple Inc. beginning this spring.