iTunes Match has finally launched here in Australia. The new service from Apple will store your entire music library in the cloud including any songs you've ripped from CD or acquired some other way and let you enjoy them from anywhere.
The service basically scans your music collection and using and array of algorithms will determine if iTunes already as a copy of your song on its servers, if not it will only upload the songs it can't find.
Chances are for most people all their songs will already be there, so you'll instantly have all your music available to you legally on all your devices for the cost of $34.99 per year.
To sign up, just open up iTunes and click on iTunes Match on the left sidebar.