Shortly after launching the beta of its Google+ social network last week, Google slammed the shutters down. Like many new Google offerings, Google+ is, for the time being, accessible only by invitation. But after distributing invites rather liberally for a day or so, Google pulled back, citing "insane demand." It's unclear when Google will kick its invitation giveaway back into full gear, but in the mean time, wannabe Google+ users have gone to great lengths to find active invitations, sometimes even scouting eBay for sales.