It's clear based on recent comments that many users are ignorant of Napster's Digital Rights Management implementation of their recently launched service. With Napster's service rumored to be coming to the Mac, here's a recap of their digital rights management system:
Purchased Music ($.99/song, $9.95/album):
Unlimited burns of individual tracks
Unlimited transfers to supported Portable Players
Copy your music to up to 3 computers
If you sign into another computer under your user account, you can use the "Sync/Restore" feature to download tracks you've already purchased onto the other computer.
Premium Service ($9.95/month - Optional)
Download an unlimited number of songs to three computers.
If you wish to burn or copy to a portable player, may purchase ($.99).
Listen an unlimited number of times as long as your subscription is active.