Google+ gets some design and performance tweaks for better results on Android 4.0
News Circles
Google+ Membership Rises As Users Share Circles
There has been a dramatic growth in Google+ members, as users get the ability to share their contact circles
Google Adds More Functionality To +1 Button
Google's +1 button has been updated to allow users to share webpages they like by pressing the button
Facebook Engineers Clone Google+ Circles
Circle Hack is an unofficial Facebook application that imitates one of the key features of the new Google+
Google Denies Rumours Of ‘Circles’ Social Network
Google has denied reports that it is preparing a Facebook competitor called Circles