In fact, the integration could help push the business value of Google+ within Google Apps, where it is expected to become eventually a full-fledged enterprise social networking (ESN) system.

ESN software, such as Microsoft's Yammer, NewsGator's Social Sites, Salesforce.com's Chatter, Tibco's Tibbr and Jive's Social Business, provides social media features like the ones on Facebook and Twitter but adapted for workplace collaboration.

Google Apps needs an ESN component, and Google has been taking steps to adapt Google+ for that purpose.

Google first made it possible for Apps administrators to offer Google+ to their users, and has also provided IT controls to centrally establish access settings to Google+ posts and Google+ multiparty videoconferencing sessions.

Google also lets Google+ users add links to videoconferencing sessions -- called Hangouts in Google+ -- to a Calendar event, so that participants can join directly from the Calendar invite or entry.