I tried out the Yahoo Music service for the free trial the other week.
Overall, the experience wasn’t bad. If you are going to use it, I would recommend having one of the WMA compatible MP3 players to use with the service. I don’t have one, but when I do get one, I’ll check this out.
Overall, the selection wasn’t bad, the music sounded good, the search was Ok. The only question is whether Yahoo will give this endevour the proper long term commitment and energy that is required. They have a tendency of launching and not iterating on a product. Also, I found the bundling of Yahoo messenger and the attempt to change my search to Yahoo to be offensive. They need to ease up on that stuff.
Overall, recommended, but have a player and try it out monthly first.