Angry Birds Blog - http://angrybirdsnews.blogspot.com/
Google+ Profile: http://goo.gl/QWEGd
You can just sign up to Google+, You still need an invitation. I am still waiting for mine as well, but if you have friends on Google+ you can ask them for an invite (if they are nice enough).What you need to know about Angry Birds Google+
'SQUAWK! Angry Birds is now available on the web for the first time ever, on the Chrome Web Store! Point your Chrome browser to the link below, and check out the game in glorious high definition!'