Here's how it works. You can listen to every track in Napster's 2,000,000 song catalog up to 5 times for FREE. After the 5th free play of any single track, you can either purchase the track or become a Napster subscriber. As a subscriber, you can download an unlimited number of full-length songs to your PC. As a Napster To Go subscriber you can transfer those tracks to your compatible portable player without paying per track.

All you have to do is register.