Our friend, John Gruber from Daring Fireball brings up a good point. Many folks have seemed to misunderstand how Napster-To-Go really works. 
If you drop your subscription, all of the music you’ve downloaded ceases to function.
In other words, with a subscription service, you’re renting music, not buying it. So, for example, you could join Napster To Go tomorrow, pay $180 to maintain your subscription during the next year, and during that time, download tens of thousands of music tracks. But if you cancel your subscription next year, all of that music will stop working. It will stop working on your computer, and it will stop working on your little Napster-compatible portable player. (And thus even while you are subscribed, you need to frequently re-sync your player to your network-connected PC, even if you haven’t downloaded more music, just so your player’s DRM software can check the status of your subscription.) And if you want to use your music in a non-DRM context, like by creating a standard audio CD, you still need to pay $.99 per track, which is in addition to your regular subscription fees. The music you download via subscription can only be used in a DRM context.