Are you still just waiting at your computer for an Ingress Invite? Well there are several things you can do to try and earn your own invite/activation code. There are several Google (Niantic Labs @ Google) employees who are actively participating on Google+ and who are either randomly posting activation codes to be snatched up by the first person to enter them in or giving away invites
First step is to add one or all 4 of these people/groups into your circles on Google+:
While making sure you keep their posts fresh in your feed, as the activation codes are first come first serve you should also work on some creative artwork that uses the Ingress or Niantic Project in some manner.
We currently don’t have any more Activation Codes to give away ourselves, but hopefully we will again soon.