Google created a bit of a media frenzy when they first launched Google+. They limited the number of invitations that they sent out. They also limited the amount of bandwidth that they made available. Getting an invitation wasn’t a guarantee that you’d be able to actually get in immediately. (I had images of trying to enter an exclusive nightclub and not being able to get past the bouncer.) Was this part of their plan to generate buzz and anticipation? Some of my favorite bloggers were tweeting and posting on Facebook that they were in and were offering invitations. It certainly appears to me that it was an effective marketing campaign.