Google+ Now Open to all

Gplus Registration Page
G+Registration and Login Page

Google+ (Google Plus, G+) is a social networking and identity service, operated by Google Inc. Google+ integrates social services such as Google Profiles and Google Buzz, and introduces new services Circles, Hangouts, Sparks, and Huddles. The service launched on June 28, 2011 in an invite-only “field testing” phase. The following day, existing users were allowed to invite friends who are over 18 years of age, to the service to create their own accounts. This was suspended the next day due to an “insane demand” for accounts. Today (19th July 2011) Google plus made it public to everyone.
After being invite-only for nearly three months, Google+ just made it public to everyone. On Google’s official blog its written as the 100th feature of Google plus. 100. Anyone can sign up for Google+—no invitation required. Some of the other latest features are Search in Google+, Hangouts APIs, Hangouts On Air etc…