Google Music

Google Music is in beta now, it lets you put your music in Google Music Library, and it will stream songs to you. Now, it is invite-only, but it will open to public late.

First, you have to download a client that called "Music Manager", you can use it adds music to iTunes library, Windows Media Player library, My Music folder, or any folders you chose. Your songs will automatically upload to Google Music Library. When you want to open your Google Music, it will let you to stream songs via internet. Actually, it is not only working on website, it works very well with Android devices, just go to Android Market install application.