Digital music provider Puretracks has announced a partnership with Research In Motion. Built in conjunction with Magnet Mobile Media, Puretracks’s new DRM-free mobile music store for BlackBerry smartphones will work with all BlackBerry Pearl, BlackBerry Curve and BlackBerry 8800 series smartphones.

The service uses digital music technology developed exclusively for wireless handsets using compressed AAC/AAC+ file formats, half the size of MP3 files, promising reduced download time and storage capacity required while maintaining CD quality sound.

Puretracks and RIM unveiled a sneak peek of the service for BlackBerrys at a South By Southwest event in Austin, Texas, earlier this week. A full version of the mobile music service will launch at CTIA Wireless April 1.