Mountain View's kept itself as the gatekeeper for Google Glass with dev signups at I/O and a social media contest, but now it's letting some users spread the wearable computing love. Google+ is lighting up with reports that Glass Explorers are receiving emails from Page and Co. allowing them to invite a friend to snag a device by joining the program. In order to be eligible, invitees must be a US resident, at least 18 years of age, and willing to pick up the hardware in San Francisco, New York or Los Angeles. Google's told us that a "small subset of Explorers" have received the message in its continuing effort to expand the affair. Earlier today, the search giant announced that it cast a wider net for Explorers by enlisting five film schools to suss out how the contraption can be used for everything from character development to production. Head past the break for the full list of institutions.