I actually might keep posting, it seems fun here. I'm not really a forum guy thou but I will take the time to dig a little more in the forum and we'll see. Tom
http://www.hackhow.com/google-plus-new-invite-trick-that-can-let-you-in-right-now/ it seems that the post should be assigned to the invite circle only. and not public to everyone, just members of the “invite” circle.
I dont' know if private or public changes anything. I already registered on https://plus.google.com/ on launch day. It seems to me there is a limited number of user per day and maybe it was too late when I opened the email. I'll try again tomorrow.