I am hooked on Yahoo's new music subscription service, Y! Unlimited.

• Access to over 1 million songs, streamed instantly or download as much as you want.
• As you rate music (songs, artists, albums), the music engine begins to suggest new music that matches your tastes.  I've already listened to a ton of great music I would have never taken the risk to buy.
• There are over 120 commercial-free "radio stations".  These are basically streamed play lists that you can play on demand.  Don't like the song currently being played?  Skip to the next one.  Create your own radio station and hear music based on your tastes.
• Tracks are encoded at 192kbps.  They sound great.
• Fill and re-fill your compatible MP3 player as often as you like, just like Napster-to-Go.
• Use your account on up to 3 computers.  Just don't try to use it on more than one computer at the same time.

$4.99 per month (yearly subscription) or $6.99 if you want to pay by the month.  How can you beat that?