Once the site comes back online, those who have previously signed up for the beta will have access to the first betas of iOS 9 and OS X El Capitan. Though, if you’re interested in signing up but haven’t yet, that may still be a possibility.
iOS 9 and OS X El Capitan come with some major features, mostly focusing on polishing up both operating systems. If you missed it, check out what’s new in yesterday’s developer beta release of iOS 9.
UPDATE: Apple’s beta website is back online and the beta is now available to all registered beta testers!