Google+ is a great tool for quick interaction!
I have been using Google+ for a while and liked it mainly for the search engine optimization and added a company page. Another smooth functionality was the circles adding people to different topics for sending information about updates and further interaction.
The connection to Gmail and connect to calender with import and export of e-mail adresses and the automatic connection from my mobile scanning business cards is a great functionality! This is especially useful when they have a QR code and I can highly recommend Kimberley Reynolds who is specialized in this and knows social media inside and out.
But today I have used Google+ similar to a Twitter follow friday with #hashtag after an invitation from Erik Andersson who is a very savvy and creative swede. I know there are a lot of people who write about ideas as they came up with them and do not give cred to the inventor.