Google+ now gives members a link that up to 150 people can use to join the network. So, if you want to check it out and you’re one of the first 150 people to click on this link, it will let you join.
Also, here are some new additions to The Best Resources For Learning What Google+ Is All About:
5 Free Tools for Recording Google+ Hangouts is from Mashable.
The Mother of All Google+ Resource Lists is from The Next Web.
Google+: The Dark Side of the Circle is by Ira Socol.