A major update to Amazon's (US only) Cloud Player service is already familiar to iTunes users.
The web commerce giant has announced the addition of Scan and Match to Amazon Cloud Player.
Cloud Player is now able to scan existing iTunes and Windows Media Player libraries and matches those tracks to Amazon's 20 million song catalogue.
250 songs can be matched free of charge; a $US24.99 annual subscription boosts that to 250,000 tracks.
MP3 tracks purchased from Amazon are not counted towards those limits, and are automatically added to the customer's Cloud Player to serve as a backup as well as providing mobile access.
(iTunes Match also costs $US24.99, but only allows 25,000 tracks.)