Sony is getting serious about its new Music Unlimited service, powered by its Qrocity library of 7 million songs. Like Microsoft’s Zune Pass, the subscription service lets you stream an unlimited amount of music on your computer and other devices for $3.99 – $9.99 per month. The service launched in the U.S. this past January, but its progress has been slowed by Sony’s network problems during the month of May. Eager to regain its lost time, Sony has launched the service on Android and is giving PS3 users a free pass to try it out.

A Music Unlimited app for Android smartphones running Android 2.1 or higher is now available on the Android Market. It is compatible with all of Sony’s Xperia phones, including the Xperia Play, and comes with a free 30-day trial of the service. However, those who have a PS3 are getting a much longer free trial. As a bit of a thank you, PlayStation 3 users get a 180-day (six month) free trial of the service. To take advantage of the trial, look for the Music Unlimited icon under the Music icon on your PS3 dashboard.

Have you used Music Unlimited? Would you rather buy your music a la cart or do you like services like Zune Pass, Rdio, Rhapsody, Mog, Spotify, and others? Let us know!