Google has officially launched its +1 Button browser extension for Chrome. The extension appeared in the Chrome Web Store today described as a way "you can publicly +1 any page that you're visiting with one easy click."
Facebook has been stung by its own PR firm in an underhand plot to feed negative stories about Google to the press. The plot came to light after the influential US blogger and online security and privacy expert Chris Soghoian published an email thread between himself and the Facebook's PR firm Burson-Marsteller.
Google is in the process of developing a new social network called Google Circles, the search engine announced at South by Southwest Interactive today. It has long been rumoured that Google was working on one or a number of social networks and this announcement may be the result of the long mooted Google Me and Google Loop projects.