If you still want an invite to get into Google+, you can visit my blog: http://googleplusreview.com to get an invite.
While you're there, you can check out the list of useful tips and tricks to make your life with Google Plus that bit easier.
When you get into Google+, you're going to need to bring your friends' details across from FaceBook, assuming you use it... The only way currently to get _all_ of that data is to export the data to a yahoo account, then from there, export to to the Gmail account you use for Google+ (http://bit.ly/o5QtsZ ).
Hope you enjoy being on Google+. It's a very different experience from FaceBook.