Check out the current free listings at the Amazon MP3 website. You may have to look around to find the freebies. They are often mixed in with the paid offerings. Although some of the free tracks are new artists who are looking to get their break, there are also offerings from famous musicians. And it's not all hard rock and heavy metal. I just downloaded a free jazz Verve Vault sampler that included songs from Ella Fitzgerald, Billie Holliday, Charlie Parker, Sarah Vaughn and Dinah Washington. Other free offerings included everything from a Celtic Sampler to Turkish music.

You must have an Amazon account to download the free songs and you must download the free Amazon downloader. The downloader will automatically put the songs into your iTunes or Windows Media library and it works quite well. So don't be afraid to try it!