At the moment about 20 million people are on Google Plus, Google’s newly launched social network. Many of those are tech innovators, social media marketing experts and online early adapters.
This is the traditional way of growing a user base. First pioneers and innovators, then early majority, late majorty and finally laggards. This is how Facebook grew for instance.
Google Plus has the opportunity to do this differently. They need to deploy the pincer movement. The pincer movement is a military maneuver, where both flanks of the opponent are simultaneously attacked.