In news that can be filed under "better late than never," 7digital has finally brought its impressive music store to the Windows Phone platform. The company has previously promised a January arrival for its eponymous app, which now offers 18 million song tracks for sale. As you'd expect, it offers shoppers with 30 second previews of each track, and purchased music will automatically sync to one's mobile device. The Windows Phone version of 7digital now joins its Android, BlackBerry and iOS counterparts, but unique to this release is a Metro interface and support for Live Tiles -- which allows users to pin their favorite artists, tracks and albums to the home screen. Shoppers will discover a variable pricing scheme for the DRM-free music, where the majority of albums sell between $5 and $12. Inquiring minds will find the full PR after the break.