Grab them while you can! Google has just posted their invite button in Google+, that allows users with accounts to invite users without. We feel for you — those who haven’t tried the new social network. Since we care about you so much, uncle 9to5 is here to help.
Update: After inviting hundreds of people, we’ve exhausted our supply of Google Invites. If we didn’t get to you, we’ll try again next time :D