Facebook users can become "fans" of iTunes, which installs the new "free on iTunes" app for them and provides a link to the iTunes Indie Spotlight Sampler, a free mixtape of 20 tracks.
"Fan of the iTunes page on Facebook?" the apps asks. "Be sure to check back here frequently for free music, TV shows, movies, and more from the iTunes Store, exclusively for our Facebook fans."
Apple has maintained a Facebook fan page for some time, which posts links to new albums, music related apps, and links to free iTunes U content. The Indie Spotlight Sampler was first posted last month, and the download track offer is good through the end of September. iTunes currently lists 1.8 million Facebook fans.
Apple's social networking strategy of promoting offers and downloads on Facebook complements new features in iTunes 9 which allow users to post items to their Facebook page or add them to their Twitter feed.