In a recent e-mail, Yahoo alerted its Yahoo! Music Unlimited customers that it will stop distributing keys for unlocking DRM on Yahoo Music tunes by September 30, 2008 deadline. After which the servers that store license keys for any purchased Y! Music tunes will go dark. Those keys are required to re-authorize purchased, digital rights management (DRM)-protected music for a new PC or portable music device. Once the keys are gone, your songs will be stuck on whatever PC or music player they happen to be sitting on, permanently.
Microsoft in April announced plans to stop releasing DRM keys for its own MSN Music service, some two years after replacing the older music service with Zune Marketplace, but later on reversed its decision.