Amazon is offering a bunch of free music! You can select any of hundreds of free MP3 downloads including Walk A Mile In My Shoes by Elvis Presley and this X5 Free Classical Sampler – Chopin 200 Years. There are also 122 full MP3 albums!
You can also get 100 MP3 albums for only $5. There are some decent albums in here that change monthly, so you might want to take a look.