In 2001 Skype's founders had setup Kazaa, an online file-sharing service that enabled people to download music from each other's computers to the great irritation of copyright holders.
Growing businesses find that a server set-up provides more control over file management, sharing, back-up and security, plus efficiency when adding people.
The suit also names Michael Fitzgibbons, a Virginia personal injury attorney who is accused of using close ties with labor unions to setup screening halls where workers would obtain X-rays and materials to file asbestos claims.