Apple's Developer Center has returned after a long eight days of downtime that began in response to a security threat last week. The recently launched System Status page shows that the iOS Dev Center,Mac Dev Center, and Safari Dev Center are all back up.
Developers will still need to be patient though as not all functionality has returned. For example, the developer forums remains down, while other functionality, like downloading beta release software, is already back up. This is definitely a promising sign for developers.