or make funny pic, related, and put ingress logo on it, post in link above on g+, ???, ....., profit!!!!!!
It is weird, found a few other friends that trying to get in, nothing for weeks so far!
EDIT: my day 1 friend that got an invite 3 days or so ago had 1 invite, gave it to his brother..... how do we get invites now is the big question! LOL