So...no one else is interested in this or want to develop it? There are like 100 million G+ users now, seems that allowing them to sign up to your forum with their Google account would be quite helpful.
Sooo, what sort of person would I need to hire to get this made. I can use the Google, but don't know what terms to search for. Do I need to find a CSS type person, or a Xenforo coder...I know nothing of these coding things, thanks.
It's integrated into the "Livefyre" commenting system on my blog, gnarld.com , I'm sure I've seen it a few other places as well. It's surely not widespread though.
Atfirst I thought the built in twitter integration option allowed for account login aswell but after looking at it again it doesn't seem like does so that addon Stewart linked really fills in the gaps.