It was a little over a month ago that Google introduced Google+ Sign-In. The basic idea being the same as it is with Facebook and Twitter: use one account to access all your sites. So, what makes this different from those other networks? Well, allegedly this will result in less social spam and a better integrated experience. Oh, and also, now that Mountain View has signed deals with Janrain and Gigya, the big red button should be just about everywhere on the internet.

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