MeCanto lets you upload your entire music library, then stream it to your Android or Symbian S60 phone. Psonar gives you backup and lets you upload and download content to and from your mobile phones.
US company mSpot is launching its music service in Europe this month. It lets you store 2GB of music in the cloud and then access it from Web-connected devices.
A new app called Cloud Music uses Google Docs to offer a quick-and-dirty music locker service, but it can't compare with full-fledged music lockers like MP3Tunes.
Learn five ways to stream your music collection over the internet.