Apple updated its developer website with a new message for developers and a system status page that'll track the restoration of key features. The latest information from Apple does not shed any light on the hack that brought the system down. It only confirms that services will be restored gradually. Here is the message:
We apologize for the significant inconvenience caused by our developer website downtime. We've been working around the clock to overhaul our developer systems, update our server software, and rebuild our entire database. While we complete the work to bring our systems back online, we want to share the latest with you.
We plan to roll out our updated systems, starting with Certificates, Identifiers & Profiles, Apple Developer Forums, Bug Reporter, pre-release developer libraries, and videos first. Next, we will restore software downloads, so that the latest betas of iOS 7, Xcode 5, and OS X Mavericks will once again be available to program members. We'll then bring the remaining systems online. To keep you up to date on our progress, we've created a status page to display the availability of our systems.
If your program membership is set to expire during this period, it will be extended and your app will remain on the App Store. If you have any other concerns about your account, please contact us.
Thank you for your continued patience.
You can check the status of the developer portal here.