Apple has released iTunes 10.5.1 for immediate download through Apple’s site with iTunes Match available. It’s not available via Software Update yet.
iTunes Match is now listed as a feature in the iTunes and users can subscribe for US$24.99. It’s listed as a beta feature, and beta subscribers are warned that their iCloud libraries will be deleted at the end of the beta. To thank those for their participation, they will receive an additional three months on their subscription.