Rhapsody has beta-launched a Facebook widget designed to extend full-song music streaming into the popular social network. The application allows Facebook users to recommend songs, and lets visitors to their profiles stream the full versions of songs by artists listed in each member's "Favorite Music" section.

Existing Rhapsody subscribers will be able to play an unlimited number of full songs, while non-subscribers will be limited to the 25 free songs a month that are offered under the company’s ad-supported model.

Rhapsody has also extended all 150,000 artist bio pages to Facebook as well. The company says additional functionality will be added over time.