Loudeye Technologies (LOUD) was up 75.2% in preopen Island trading after the company announced an agreement with file-sharing service Napster. Under the agreement, Loudeye is providing tracking technology for use in Napster's planned membership service.

The move will also help Napster filter copyrighted material.

In a press release, Napster's CEO said ``Loudeye's fingerprints and metadata will ultimately help us track millions of unique music files on our service, so we can fulfill our commitment to compensate artists, songwriters, music publishers and record companies.''