Google Music Beta
Google is now in the Music business! The service which is not launched proper is on invite only and on Beta. This is a cloud based service which means all your favourite music is stored online & is always kept synced across devices that you authorize to have access to your account and you can access it anytime provided you have decent internet service.
Whats cool is now you dont need to worry about the music files taking up too much space on your devices.
Head on HERE and request a invitation!