I have two invites I can dole out.
I'd try to explain out the details of Ingress, but after some searching it appears Wiki has a well laid out explanation already (go figure):
http://en.wikipedia.org/wiki/Ingress_(game)
As Jay mentioned, he and I are playing on the Enlightened faction side. While it would behoove us tremendously to only allow the keys we have to the game to go to those who are going to go with our faction, we can't MAKE people do anything. However, we are a strong community, and are currently the underdogs. You'll find much greater success, and maintained interest levels playing with people you know already know, than jumping into a faction who's dominance thwarts player growth.
Also, as I hope Jay can attest to, having a friend guide and assist you in leveling in the first month is really awesome.