Still got a MobileMe account? Effective today, if you had an active MobileMe account your service has been automatically extended through June 30, 2012 at no additional charge. After this, MobileMe will cease to exist.
You'll have the ability to move over your MobileMe mail, contacts, calendars and bookmarks to iCloud once it becomes available this fall. And if you purchased the MobileMe box and haven't used the activation code inside, you can get a refund for it by submitting a refund request.
Via Apple Support
(Via Mac|Life all.)