Okay, I clearly need to refine my decision criteria for what gets posted where (e.g., using channels such as Blogger and Google+); stay tuned… For now, in any case, as Volker shared below, it appears Google+ is wide-open
Volker Weber originally shared this post:
The invitation process now seems to be permanently open. Which means that Google now has sufficient data about the system and knows how it performs. The initial wave has come ashore and they can grow the user base.