[W]e’ve been making the hardware better, too. We want to say 'thank you' for all the amazing feedback we’ve been getting, so later this year, all Explorers will have a one-time option to swap out their existing Glass for a new one. This hardware update will allow your Glass to work with future lines of shades and prescription frames, and we’ll also include a mono earbud.
Google is also pushing for a speedier uptake of Glass and so is asking users of the ad-powered wraparounds to spread the word by inviting three friends to sign up to the Explorers Glassholes programme. It said:
They’ll be able to buy Glass online and can have it shipped to their home, office, treehouse or igloo. We’re counting on you to get Glass to the people you think will make great Explorers. More Explorers means more feedback, and more feedback means better Glass.