There is going to be 12 hour maintenance on Tuesday.
We will be performing scheduled game maintenance for Diablo 3 on Tuesday, February 19th. Maintenance will begin at 1:00 AM PST and is expected to last for 12 hours. During this time Diablo 3 will not be available for play. In addition, many web services will be unavailable.

Thank you for your patience.

Another banwave maybe?