Google has re-enabled invitation for Google+ and since I have been previously invited, I am now part of the new social networking craze of Google. It is nice to see that I have friends who have added me to their circles as well.
Head over to Google+ and find out if you can register. Open your browser and key in this URL: http://plus.google.com.
Make sure you read the terms of service. I have heard rumors of accounts getting banned due to Google+ misuse.