Legalised peer-to-peer (P2P) service Mashboxx has signed up its first major label in the shape of SonyBMG. The agreement allows for SonyBMG music to be legally traded and purchased via searches performed on major existing file sharing networks. Mashboxx will be recognized as the first – and only – desktop file sharing application in the world authorised by a major content owner.

Mashboxx is built upon the technology base of Snocap that tracks files across P2P networks, allows sample tracks to be played, matches them with legalised versions for $0.99 and the user has a voice cutting in to promote buying the song.

The New York Times (sub req) has a good summary. Reuters has details.