Google+ is now open to the public. In a blog post yesterday, Google Senior Vice President of Engineering Vic Gundrotra announced that the global roll out of Google+ includes 9 new features and many more features are coming in the future.
You can create a Google+ account here. Anyone can sign up, and it's completely free to use.
Google+ is a great social tool to build relationships and promote your blog content. I've been using Google+ for some time now, and it's been great. With the new features expected to launch in the future, it's only going to get better!