iTunes 10.5.1 has just released. This latest update adds iTunes Match, which is a service that syncs your playlists to iTunes. For instance, if you have a song on your playlist that you imported from a CD, iTunes Match will find it on iTunes and give you the option to download it.
It will cost you $25 per year and will sync up to 25,000 songs, so you may want to weigh your options. Keep in mind that the imports will be in Apple’s AAC format, which may be higher quality depending how you imported your CDs in the first place.
The service did see a slight delay as Apple said it would release by the end of October, but it seems that it was held back a few weeks in order to make it more solid. Still, it’s probably nothing that a majority of users were worried about.
Download it at Apple’s website. At the time of this writing, you can’t access it through the Apple Menu, as you will be told your software is up to date.