If you ever wanted proof that Google+ is, in fact, not a social network but rather an all-in bid for your identity, here’s your pudding: mere weeks after the announcement of the Google+ login button, hundreds of major media outlets are using the Google+ button for their web and mobile user logins. Tuesday, Google announced that American Idol, Universal Music Group, Fox Broadcasting company and hundreds of other partners are doing Google+-flavored sign-ins. PC Magazine Google has partnered with social infrastructure platforms Janrain and Gigya to bring the new Google+ Sign-In feature to popular brands. When users log into one of the company’s product sites with their Google+ credentials, they can bypass registration forms and avoid having to create a new username or password. TechCrunch As Google product management director Seth Sternberg told me, developers obviously like the fact that they can use this service to easily enable two-factor authentication on their sites. In his view, however, there are two breakout features that so far have been more successful than Google expects: over-the-air Android installs – which check if a website user also own an Android phone and lets you install a site’s mobile app with just a click – and the interactive posts to Google+ that are made possible through the new sign-in infrastructure.