Apple has sent out an email today to registered developers to notify them of the reopening of the iTunes Match beta program to additional developers in the United States. In other words, any developer who was not able to register for iTunes Match beta testing in the past, due to max quota being reached within hours, can now try out the cloud music service. iTunes 10.5 beta 8 is required by developers to test iTunes Match, and Apple warns that all music libraries that are uploaded to iCloud will be deleted at the end of the beta testing period.
iTunes Match stores your music library in iCloud and allows you to enjoy your collection from anywhere, any time, on your iPhone, iPad, iPod touch, or computer. Any of your songs, including music you’ve imported from CDs, that matches with the 18 million songs in the iTunes Store will become available in iCloud and will play back at iTunes Plus quality (256 Kbps DRM-free AAC) — even if your original was of a lower quality.