For those of you who are still out of the Google+ gate, a few ways of getting in without an invite have been cropping up. Of course, Google's looking for all these holes and plugging them, so if you want in, get in while you can. The first way uses iOS, so either with an iPhone, iPod Touch or an iPad. Use Safari to go to plus.google.com. If you're on a Mac, go to the mobile version of the site. When you tap on “Sign in”, you'll be presented with a sign up form for Google+ which will ask you for your name and sex. You can sign up with your regular Gmail account. This might take you to the mobile version of Google Buzz, however, sign in with the credentials you created from your PC (full version of Google+) and you should have access.
Want to get in on the hangouts?
Since Google is constantly plugging holes in the system, the first method may or may not work for you. The Google+ service is currently at capacity, but if you still want to get in, here's another hack. Use Google's Chrome browser and download this Chrome app. When installed, click on the Google+ icon in a new tab. You will be taken to a sign up page where you can join the service. A third method is via a link to your own profile (https://plus.google.com/u/0/me). This will take you to the Google+ sign up page directly. Good luck getting into the system.