I shared a little information about the site on Google+. I made sure the link was "Public". However, I imagine other existing users of this site may have both better and different social networks to me. @ArtemKaznatcheev also suggested to me that there may be quite a few academics on Google+. Obviously, I'm not trying to be spammy, I'm just keen to broadly get the word out to academics, graduate students, and other experts about what the site is about and how it could constitute a great resource.
How can we encourage users to share the link on Google+?
Also, if you have shared the link, perhaps put it in the comments below, so we can get a sense of the reaction and also how you phrased the introduction.