So this one look interesting. From Napster, via email:

New Offer: Download 5 Songs + Play 7 Million More = $5 Per Month

Dear Valued Customer,

Play all the music you want from Napster's huge library, from any Internet-connected computer—millions of tracks covering all kinds of music. Then use your 5 monthly MP3 credits to download songs that are compatible with any player (including iPod/ iPhone), without copy restrictions or other headaches. Plus, enjoy all of Napster's great features:

  • Buy all the music you want, 5 MP3 credits are included every month
  • Get new releases every week from both major labels and independent artists
  • Listen to more than a thousand Napster playlists and over 60 commercial-free radio stations
  • Discover new music through personalized recommendations, or browse and play hits from Billboard charts going back to 1955

Napster is now an unbelievable value!

With plans starting at just $5 a month, you can get 5 MP3 credits and unlimited on-demand streaming music. To start this great offer, sign in to your Napster account, go to the My Account menu and select Account Status.

Launch Napster

More info on the Napster Blog. Looks like it's US-only and this pricing does not include devices. For that, you need Napster To Go, which is still $15 a month and, curiously, does not appear to offer any free MP3s each month.

Also, according to the actual site, "The $5 dollar monthly subscription is a special offer – get it while you can." It will jump to $7 a month after that.