A little heads-up from the Zune team:

As part of our continued efforts to improve the service, Zune is undergoing scheduled maintenance that will prevent you from renting and purchasing content for up to 24 hours starting 10:00 pm (PST) on January 25th. Your local video and music library will continue to be available during this time.

We apologize for any inconvenience this may cause and thank you for your patience.

Sincerely,
Your friends at Zune

Apparently, this is just routine maintenance and no new features are forthcoming.