Reactivate an expired MobileMe subscription
If your MobileMe subscription isn’t set up to renew automatically, it expires one year after you purchase it. If your subscription expires, you can reactivate it and keep using your same member name.
If you renew within 15 days of the subscription expiration date, you can also still access all your MobileMe information (such as published Gallery albums or files stored on your iDisk). After 15 days, your MobileMe information is no longer available.
To reactivate an expired MobileMe subscription:
Go to me.com/renew and follow the onscreen instructions.