After eight days of downtime to overhaul the security of systems due to a hacking attempt, the Apple Developer Center has started to go back online, with iOS, Mac and Safari Dev Centers online along with Certificates, Identifiers & Profiles, Software Downloads and Bug Reporter, as seen via the System Status page:
Apple has also updated its maintenance page with the following:
We appreciate your patience as we work to bring our developer services back online. Certificates, Identifiers & Profiles, software downloads, and other developer services are now available. If you would like to know the availability of a particular system, visit our status page.
If your program membership expired or is set to expire during this downtime, 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 bearing with us while we bring these important systems back online. We will continue to update you on our progress.
Looks like things are starting to get back to normal.