By now, all the developers who signed up to receive Glass prototypes should have the headgear in hand, so Google's ready to move on to the next phase. Over the next few weeks, the company will begin sending invitations to successful #ifihadglass applicants. Invites will come via Google+, so you'll need to have +Project Glass in your Circles in order to jump to the next step. Unfortunately, the Explorer program is closed, so it's a bit too late to submit an application now. Google's promised to keep you in the loop regarding future opportunities, though. Simply add your info at the source link below to sign up for updates.