Apple's annual developer conference in San Francisco.
iPhoneDevSDK Details What Led to Apple, Facebook Hacking
Most notably, the attack was reportedly ended by the hacker on January 30, 2013, meaning the site believes that there is no ongoing threat.
We're still trying to determine the exploit's exact timeline and details, but it appears as though it was ended (by the hacker) on January 30, 2013.
As with Facebook, it's important to stress that we have no reason to believe user data was compromised.
* URL to blog post: http://iphonedevsdk.com/forum/site-news-announcements/111889-iphonedevsdk-compromised-what-happened-and-how-we-are-dealing-with-it.html -- We've avoiding linking it due to the recent hack at that site.