All you need to do is sign up w/ your email. That's the 'invitation'.
Yeah, but I was #1741 in line or something... So I "invited" 3 friends. I picked my wife, my daughter, and one of my alternative emails. Still no luck, however, my wife was able to get 100% access instantanously. So basically, the initial requester, me, couldn't get access, but someone (my wife) who was invited by someone else that didn't have access (again, me) gets right in.
Either way, nothing there rack wise for what I was looking for, but thanks...